Question

25 +( х-2 )*15 =70..
72/ (12-х /4)=9. надо решить уровнение

Answer 1

25 +( х-2 )*15 =70
25 + 15х - 30 = 70
25 + 15х = 70 + 30
25 + 15х = 100
15х = 100 - 25
15х = 75
х = 75 / 15
х = 5

72/ (12-х /4)=9
12 - х/9 = 72 / 9
12 - х/9 = 8
х/9 = 12 - 8
х/9 = 4
х = 4 * 9
х = 36

Answer 2

25+15х-30=70
15х=70-25+30
15х=15
х=1