Answer:
x=-12
Step-by-step explanation:
I did it in my head.
x = -16
7x -2(x+1) = 6x+14
7x-2x-2 = 6x+14
5x-2 = 6x+14
6x-5x = -14-2 = -16
let's notice, this is a Cube, namely all equal sides, and mind you it has 6 sides, Check the picture below.
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