barashm 7х-(3+2х)=х+9
7х-3-2х=х+9
7х-2х-х=9+3
4х=12
х=12÷4
х=3

13-(2х-5)=х-3
13-2х+5=х-3
-2х-х=-3-5-13
-3х=-21
х=-21÷(-3)
х=7

3х-(10-9х)=22х
3х-10+9х=22х
3х+9х-22х=10
-10х=10
х=10÷(-10)
х=-1

26-(17-2х)=5х
26-17+2х=5х
2х-5х=17-26
-3х=-9
х=-9÷(-3)
х=3

RickSanchez21 1)7x-(3+2x)=x+9
7x-3-2x=x+9
5x-3=x+9
5x-x=9+3
4*x=12
x=12:4
x=3
2)13-(2x-5)=x-3
13-2x+5=x-3
18-2x=x-3
-2x-x=3-18
-3= -21
x=7
3)3x-(10-9x)=22x
3x-19+9x=22x
12x-10=22
12x-22x=10
-10x=10
x = -1
4) 26-(17-2x)=5x
26-17+2x=5x
9+2x=5x
2x-5x= -9
-3x= -9
x = 3
Вабба лаба, даб, даб!