12=(-x)+9

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Solution for 12=(-x)+9 equation:


Simplifying
12 = (-1x) + 9

Reorder the terms:
12 = 9 + (-1x)

Solving
12 = 9 + (-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) = 9 + (-1x) + (x)
12 + x = 9 + (-1x) + (x)
12 + x = 9 + (-1x) + x

Combine like terms: (-1x) + x = 0
12 + x = 9 + 0
12 + x = 9

Add '-12' to each side of the equation.
12 + -12 + x = 9 + -12

Combine like terms: 12 + -12 = 0
0 + x = 9 + -12
x = 9 + -12

Combine like terms: 9 + -12 = -3
x = -3

Simplifying
x = -3

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