1) -5(-5+3х)-1=9х+5*6 решите заранее 2) 9/10х= -5 3)-3/7х= -27/49 4)-3(6х+2)-1=4(х-3)-9

1) -5(-5+3х)-1=9х+5*6
-5(-5+3х)-1=9х+30
25-15х-1=9х+30
24-15х=9х+30
-15х-9х=30-24
-24х=6
Х=-6/24
Х=-1/4
Х=-0.25

2)9/10х=-5
-9/5=10х
10х=-9/5
Х=-9/5:10
Х=-9*1/5*10
Х=-9/50
Х=-0.18

3)-3/7х=-27/49
Х=-27/49:(-3/7)
Х=-27/49*(-7/3)
Х=-9/49*(-7)
Х=-9/7*(-1)
Х=9/7

4)прости не смогла