Ответ:
a) (7x+1)-(9x+3)=5
-2x=5-1-3
-2x=1
x=1:(-2)
x=-2
б)5x+8=3(3x-4)+4x
5x+8=9x-12+4x
5x-9x-4x=-12-8
-8x=-20
x=-20:(-8)
x=2,5
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Answers & Comments
Ответ:
a) (7x+1)-(9x+3)=5
-2x=5-1-3
-2x=1
x=1:(-2)
x=-2
б)5x+8=3(3x-4)+4x
5x+8=9x-12+4x
5x-9x-4x=-12-8
-8x=-20
x=-20:(-8)
x=2,5