1) 12,5-5x=0 2) 18-0,2(3x-70)=x

Question

1) 12,5-5x=0

2) 18-0,2(3x-70)=x

Answer 1

12.5-5х=0

-5х=0-12.5

-5х=-12.5

х=-12.5:(-5)

х=2.5

ОТВЕТ:2.5

 

18-0.2*(3х-70)=х

18-0.6х-14=х

18-14=х+0.6х

4=1.6х

х=4:1.6

х=2.5

ОТВЕТ:2.5