Решите уравнение 19 x-4x=120 2x+7x-12=69

Question

Решите уравнение 19 x-4x=120 2x+7x-12=69

Answer 1

19х-4х=120
15х=120
х=8

2х+7х-12=69
9х=69+12
9х=81
х=9

Answer 2

19х-4х=120
15х=120
х=120/15
х=8

2х+7х-12=69
9х=81
х=81/9
х=9