12-(-x)=-9

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


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

Remove parenthesis around (-1x)
12 + -1 * -1x = -9

Multiply -1 * -1
12 + 1x = -9

Solving
12 + 1x = -9

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + 1x = -9 + -12

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

Combine like terms: -9 + -12 = -21
1x = -21

Divide each side by '1'.
x = -21

Simplifying
x = -21

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