+ 9 9

7 ABCD EFG A B C D E F G 9 ABCD + EFG = 99 ABCDEFG A B C D + E F G 9 9 BCDEFG D = 4 ABCD EFG C = 4 ABCD EFG A B B A 4 0 4 4

= = = 4 4 6 6

H E H E ( ) H E + H E A H ( ) A B C D + D C B A A B C D 0 + 8 6 4 9 7

9 8 9 + ( ) 4

9 A 4 0 B C D 8 E

+ + + 4 + + 6 + 7 + 8 + 9 = 9 +8 + 7 + 6 + + 4 + + + = 0 +0 +0 +0 +0 +0 +0 +0 +0 = 90

8 + + + + =? 4 99 00 = =. = 6 = =. 6 6 =

+, + - 00 99 00 0. + + + + 4 9900 =. + + + 000 0 0 00 + 9900

x x = 6 9 0 x x + 0 x + 0 x

x - x 6 0 6-0 = x 0x - x - x x + ( ) ( x) = 0 6 0 7 - = 7

0 = 6 6 6 6 4 6 6 8 40 6 0 8 x x a a(+ 0%) a x 6a a x 6 0 x 0 x + = x a( + %) a a x 6

70 x + = 4 0 6 ( ) x x

x + x ( 6 x) + ( 8 x) x = 8 6 7 = 7 ( ) 7 49 a a a + 40 0 a = ( a 4 + a 0 ) x x 4 y 0 8 6 4

4 x y y 7 7 4 ( x + ) = [ x + ( x + )] = x + ( x + ) 7 y x x 7

x = y = + y = y ( 99 ) [ 96 ( )] 8 ( ) x 8 y x y y 8, y x 8 7 y x 8 x y = 70,

4 9

A7 9 A A7 9 A 7 A

00 0 99 00 0 99 9 0 8 0 89 abab 4 4 4 4 ab 99 ab < /PGN0064.TXT / PGN > 9 ab abab ab000ab ab00 ab 9

ab abab 9 98 abab 4 4 4 4 ab 98 ab abab 4 4 4 4 ab 000ab 98ab 9 ab 9 9 6 46 ab 46 ab 46

a a a 70 a +a = 70- =706 a = 706- = 68

666 4 4 66 7 9906 990 6 = 4 666 6 4 9906 666 4 4 66 = 666666 6666666666660000 + 6666 9906 6 6 4 4 4 4 4 4 4 4 7 666 4 4 66 7 990 6

. 4A97A 7A 6

. a = 99 4 4 99 4 4 4 99 4 9999

8 9 7 8 800 9 7-7 = 7 7 8 800 + 800 - = 4760 9 7 7 0

7 0 - = = 6 7 - = 0 0 4 6 = 0 0-7 0 0 = 0 0 = [- 7 0 - - 7 ] = 0 0 [ - 7 - ] 0 0 [ - 7 ] = 0 0-7 - = 0 0 7 7 4 6 7

6 4-4 = 6 7 6 4 - = 70 7 70 = 84 7 - = 84 6 6 7 4 8 6 = 8 6 8-6 = 6 [ 8 - - 6 ] = 9 8 BD 8 + - + 8 8 8 + -= 9( ) 8 4 8.6 ( 4 ), 4 = 9. 6,

9.6-8.6 = - = 4-8.6 - = 8.6-4 - = 9 6 = 40 6 6 40 = 6 CB 40 = 7 40 [ - 60 ] = 40 6 4 7 6 4 4 4 4 4 + 4 4 = 9

9 + 4 = 7 6-7 = 8 6 9 6 8 6 6-4 + 4 + = 6 6 = 70 9 4 6 6 8 8 8-8 8 = 8 8 8 - - = 88 8 88 8 = 7 8

0 6 = 8 48 48 = 48 48 8 = 7-7 6-8 84 48-84 = - 4 6 84 4-4 = - 0 = 0 0 = - 4 - = 0

4 - - - 0 0 4 4 = + - 4 6 4 6 6 = 8

. 08. 0 8 4 4. 7 40 84 8 8 4 6. 60 0 4 4 8..6 4

9. 0 B C 4 D 9 A B C. 9. 6 6

x x x + x = 6 48 x = 8.

40 9-9 0 6 40 4 4 ( )

S = = 4 S S + S( + ) + 0 0 0 0 0 0 = 4 + 0 0 0 40 S S0 + S40 + S60 S = S( + + ) 0 40 60 = + + 0 40 60 + + 0 40 60

6 4000 60 = 400 0 0000 = 60-400 = 9 9 4 9 0-6 = 700 700 6 = 400

700 000 = 800 4 0 40 0 y 0 + = 6 y y 6 6 %) ( +

7. 4

0 = 6 - x [ - x + ] 4 46 6 4 n A 4 n x 4 n 6n - 6 [ 4 n + - 6 n ] + x = n n x = n - - n 0 n 8 n = x = - = 8, x = 8 6

7 4 9. 7 9

n( n ) n

4 7 4 6 4

B 0 0 = B 0 0 = r = 4 r = 4 =. ADC = ABC = 0 =

DCE = ADC ADF = 0 6 = 0 6 x l0-0x6 = 0

80 4 ABC =.4 60 0 0 0 + + + 0 = 0 0 = AB BD 4 ABBD 7 7 = ACCD CD = 0 ACCD 4 = 7, = ( ) = 44

4 + = 4 4 0 [4 l + + ] + 4 4

( ). ADE ABC ( ) 8. 4

4. 4, 0

A C A B A

:

6. 4 = 4 4 60 = 9 = 6 6 98 6 7 6 + 4 ; 9 8 + 4 6 ; 8 9 4 6 + 9 8

4 6 7 8 9 + 8 6 4 9 7 9 8 7 6 4 9 0 4 7 8 8 9 0 4 0 + 0 0 4 0

99.- = 00 00. = 00 00 00 0000 = 7 00-00 - =

8 8

-

x - = x + 0 x = 00 8 0 0 x - x = 0 x = 4 l 4 = 0 7 7 x ( ) x + = 4 x x x + + = x x x ( + + ) = x x = [ ( 6+ 9)] = 0( ) [ 4 ] = 4( ) [ 6] = 8( )

6 + % x = 6. % 6 + x a b c d e a b c d e a b C d e a b c d e x [x + ( x )] = 0 4

0 4 x + y = ( x + y), 4 0 0x + y = 8x + 8y x = y, x x y x + y x y y = = = x + y. y + y y x + y = ( x + y) x = y x y 4 0 x = y x x + y

7 x y = 7 x = x. 7 y = - 7 = 8 7 y = - x x x = 7 7 77 7y x = y y x = + 7 7y x = x - 7y - 0 y y = 0 9 8 n m = ( n + ) + +

. 4A97A 4 A 9 7 A = 8 A 4 4 000 4 4 = 4 4 00 + 000 6 4 4 4 4 4 4 4 4 4 4

- = AB CD 08 - = 96 08 - - + = 60 60 - + = 48 4 - = 4 = 0 = 9 66-9 0 0 0 0 66 [- - 4 ] = 0 [ ] AB 0 66 + 0 0 66 [ - 4 + ] = 0 8- - = 40 40 0-7 4 7

4 - = 40 7 7 4 7 = 8 40 40 7-8 = 40 [ - 4-4 ] = 840 7 7 4 840 = 480 7 4 7 = 7 4.[ ] 4 4 4 84 = 6 4 4 6 4 4-8 - 6-8 = 8 8 84-8 - = 40 4 4 8 8-40 = 44 8 4 8-84 - = 44 8 4 8 8-44 = 40 4 8 6. 0 = 4 4 - = 0 7 0

60 + 0-480 4 00 = 00 4-4 = = = 4 4 4 4 4[( ) ( 7%) + ] = 0( ) 4 0 = 4 4 [ - 7 4 ] = 4 4 = 0 4 8..6 4 4 4.6.6 4 - =.6 = =

.6 = 6 6 = 4 - = 0 - = 0 - = 0-0 0 = 40 + 0-0 0 [ - - ] = 700 700-0 = 40 700 - - 0 = 400 0. A A A = 4 + B = C = + 4 + 6 9 - + - + 4 - = 40 + 40 = 60 A 4 40 = 48 B 40 = 40 C 6.9 - =

.4 - = 48 + + 48 = 0 8 48 = 8 8 - = = = 4 [ - ] = 4 4 - = 60 0 = 0 = + = 6 0

6 = 0 96 80 - = 480 + = 96 80 - = 480 + = 4 + - 6 = 7 60 6 + 7 60 = 7 60 - = 4 4 0 = 0 ( ) 4 4

0 - = 600 0 + = 6 0 600 6 = 60 0 600 6 = 40 0-8 4 4 = 4 7.4 [ ] = 7

x x 0+ 4 + 0 4 =. x = 0( ) = 4 / + 0 0. = 8( / ) 0 + 4. 70 4 4-70 = 6 - = 6 4 70

60 70 4 4 = 780 0 80 = 7 9 = 9 4 9 9-9 4 9 = 9 0-7 = 00 0 9 9 AB 4 = = ==, AC + BC 48 AB AB = =, AC + BC AB + BC+ BC = B C CD = = = BC + BD 48 6 CD = =, B C BC B C = = B C

7 96 6 96 4 = 4 96 7 + x - 96 = 96x = 64 4

- n 9 6 n 8 9 n A 7 B 8 n = 9 n 7 - n + x n 6 x = 8 n - 7 n 6 7 4 n = 8 6 6 n = 8 x = 8-7 8 n = 6 x = 6-7 = 8 6 8 = 9

S = 0 0

0 40 0 60 0.4 =.6 60 4 4.4 - -.4 4 4

44 + 66 = 0. 8 = 8% 00 ( 60 60) 8 ( 80 60) + = 6 ( ) 60 60 EAF EFB EFB EFB ABE ABC 6 6. BE EG = GF BFG = BFE

{ 0 6 [ 6 ( 0 ) + 0 ( 6 ) ( ) ( )} 0 6 + =. = 7. ( ).6. =.6 8. E F AD DC 4 DEF 4 = 6 6 8 6 = 8 = 6 = ( 4 + ) + 44 4( 4 + ).4 = 7( ) BC [( 0 ) 4. 7] 0 = 000 = ( )

( 0 + ) 0 = 0 4. =.04 4 0( 0 + ) = 0 AE AB = 4. 4 = 4. 90 7. 4. 0 = 78. 60 8. 4 4

CQB ABCD = 4 PQC BQP ABCD 4 = 8 ABCD 4 + 8 = 8 AOB BO BO DD 6 = = AOD DO 6 AOD = = 4 4 [ 4 4 ( 4 ) 4. ( ) ( 4 ) ] [ 4 4 ( 4 )] 0 0 0

( 6 ) + 4. + 4. ( ) = 8. 87 + 4. ( ) = 74. 06 4. ( 6 ) 0 = 0. 6( ) 4. ( 0 ) 4. ( d) d = 68 4. d = 68 4 d = 800 4. 4. ( ) = 4

x =, x = 800 4. 68 4 4. = 078.