Question

1). |3-8x|=7
2). |x-1|+|x+1|=4
3). |x^2-x-8|=-x

Answer 1

1) -8х=7-3
-8х=4
х=-4/8
х=-1/2
(3-8×(-1/2))=4
2) х-1+х+1=4
2х=4
х=2
(2-1)+(2+1)=4