-(9-x)=12

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


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

Solving
-9 + 1x = 12

Solving for variable 'x'.

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

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

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

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

Divide each side by '1'.
x = 21

Simplifying
x = 21

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