1)
-2х+1=1-х
-2х+1-1=1-х
-2х=1-х-х
-1х=1
х=-1
2)
1 (4x - 2)/2 = -7
2x - 1 =-7
2x= -7 + 1
2x = - 6
x = -6 / 2
x = -3
