3(x+5)=7-5x 13-(2x-5)=x-3 4x+5(3-2x)=5-11x

Question

3(x+5)=7-5x

13-(2x-5)=x-3

4x+5(3-2x)=5-11x

Answer 1

3х+15=7-5х

3х+5х=-15+7

8х=-8

х=-8:8

х=-1

 

13-2х+5=х-3

13+5+3=2х+х

21=3х

х=21:3

х=7

 

4х+15-10х=5-11х

4х-10х+10х=-15+5

4х=-10

х=10:4 х=2,5