2)9х-(5х-4)=4х+4
9x-5x+4=4x+4
4x+4=4x+4
4x-4x=4-4
0=0
x - любое число
3)6х-15=4х+11
6 x - 4x = 26
x (6 - 4) = 26
x * 2 = 26
x = 26/2
x = 13
4)6-8(х+2)=3-2х
6-8х-16=3-2х
-8х-16=3-2х
-8х+2х=16+3-6
-6х=13
х=13/-6
х=-2 1/6
2)9х-(5х-4)=4х+4
9x-5x+4=4x+4
4x+4=4x+4
4x-4x=4-4
0=0
x - любое число
3)6х-15=4х+11
6 x - 4x = 26
x (6 - 4) = 26
x * 2 = 26
x = 26/2
x = 13
4)6-8(х+2)=3-2х
6-8х-16=3-2х
-8х-16=3-2х
-8х+2х=16+3-6
-6х=13
х=13/-6
х=-2 1/6