Решите уравнения. 12x - 7x = 30, 6,5x - 12 = 4,5x +8

Question

Решите уравнения. 12x - 7x = 30, 6,5x - 12 = 4,5x +8

Answer 1

12x-7x=30
5x=30
X=6
6,5x-12=4,5x+8
6,5x-4,5x=8+12
2x=20
x=10