Question

Помогите!
14x-x-28=167
8a+7a+15=420
16y-7y+38=3683

Answer 1

14x-x-28=167;

13x-28=167;

13x=167+28;

13x=195;

x=195:13;

x=15.

8a+7a+15=420;

15a+15=420;

15a=420-15;

15a=405;

a=405:15;

a=27.

16y-7y+38=3683;

9y+38=3683;

9y=3683-38;

9y=3645;

y=3645:9;

y=405