А 22
- 1/7 : ( - 5 ) = 1/35
Ответ 1/35
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А 25
( 3x + 8 )( 8x - 1 ) = 0
3x + 8 = 0
3x = - 8
x = - 8/3
x = - 2 2/3
8x - 1 = 0
8x = 1
x = 1/8
Ответ ( - 2 2/3 ) ; 1/8
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А 26
4( x - 1 ) - 3( x + 2 ) = 6
4x - 4 - 3x - 6 = 6
x = 6 + 10
x = 16
Ответ 16