12=-x+7

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Solution for 12=-x+7 equation:


Simplifying
12 = -1x + 7

Reorder the terms:
12 = 7 + -1x

Solving
12 = 7 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
12 + x = 7 + -1x + x

Combine like terms: -1x + x = 0
12 + x = 7 + 0
12 + x = 7

Add '-12' to each side of the equation.
12 + -12 + x = 7 + -12

Combine like terms: 12 + -12 = 0
0 + x = 7 + -12
x = 7 + -12

Combine like terms: 7 + -12 = -5
x = -5

Simplifying
x = -5

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