8+4=2(x+-1)

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Solution for 8+4=2(x+-1) equation:


Simplifying
8 + 4 = 2(x + -1)

Combine like terms: 8 + 4 = 12
12 = 2(x + -1)

Reorder the terms:
12 = 2(-1 + x)
12 = (-1 * 2 + x * 2)
12 = (-2 + 2x)

Solving
12 = -2 + 2x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2x' to each side of the equation.
12 + -2x = -2 + 2x + -2x

Combine like terms: 2x + -2x = 0
12 + -2x = -2 + 0
12 + -2x = -2

Add '-12' to each side of the equation.
12 + -12 + -2x = -2 + -12

Combine like terms: 12 + -12 = 0
0 + -2x = -2 + -12
-2x = -2 + -12

Combine like terms: -2 + -12 = -14
-2x = -14

Divide each side by '-2'.
x = 7

Simplifying
x = 7

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