1232671 1.4х -2х= -2,5- 5,5
2х= -8
х= -4
2.4-2х-6= 4х-20
-2х-4х= -20+ 2
-6х = -18
х= 3

danilfilipov27 1)4x+5,5=2x-2,5
2x=-8
x=-4
2)4-2(x+3)=4(x-5)
4-2x-6=4x-20
-6x=18
x=-3
3)12x=7x-35
5x=-35
x=-7