Решите уравнение 4х-2(3+х)=9-х

Question

Решите уравнение 4х-2(3+х)=9-х

Answer 1

4x - 2(3 + x) = 9 - x
9 - x = 4x - 2(3 + x)
9 = x + [4x - 2(3 + x)]
9 = x + [4x - (2 · 3 + 2x)
9 = x + [4x - (6 + 2x)
9 = x + [4x - 2x - 6]
9 = x + [2x - 6]
9 = x + 2x - 6
9 = 3x - 6
3x = 9 + 6
3x = 15
x = 15 ÷ 3
x = 5

Answer 2

4х-2(3+х)=9-х
4х-6-2х=9-х
4х-2х+х=9+6
3х=15
Х=5