Answer:
x=2
Explanation:
x = 2
(10 + 2x + x = - x + 18)
10 + 2x + x = - x + 18
10 + 3x = - x + 18
10 + 3x + x = - x + x + 18
10 + 4x = 18
10 - 10 = 4x = 18 - 10
4x = 8
4x ÷ 4 = 8 ÷ 4
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