1) -2(2х+5) = 7х + 3
-4х - 10 = 7х + 3
7х + 4х = -10 - 3
11х = -13
х = -13/11 = -1 2/11
2) -2(2х + 5) = 19
-4х - 10 = 19
-4х = 19 + 10
-4х = 29
х = -29/4 = -7,25
3) -(3+2х) + 3 = -2(2х+5)
-3 - 2х + 3 = -4х - 10
-2х + 4х = -10
2х = -10
х = -5
4) 2(3х-8) = -2(2х+5)
3х - 8 = -2х - 5
3х + 2х = -5 + 8
5х = 3
х = 0,6
5) 2х - 8 - (7х + 3) = -2(2х+5)
2х - 8 - 7х - 3 = -4х - 10
-5х + 4х = -10 + 8
-х = -2
х = 2