Question

1)2,5х+3(0,5х-1,8)=-3,8
2)7-2х=9х-8(х+1)

Answer 1

1)
2,5х+1,5х-5,4=-3,8
4х=-3,8-5,4
4х=-9,2
х=-2,3.

2)
7-2х=9х-8х-8
7-2х=х-8
7+8=х+2х
15=3х
Х=5