12-(x+3)=-9

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Solution for 12-(x+3)=-9 equation:


Simplifying
12 + -1(x + 3) = -9

Reorder the terms:
12 + -1(3 + x) = -9
12 + (3 * -1 + x * -1) = -9
12 + (-3 + -1x) = -9

Combine like terms: 12 + -3 = 9
9 + -1x = -9

Solving
9 + -1x = -9

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 = -9 + -9

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

Combine like terms: -9 + -9 = -18
-1x = -18

Divide each side by '-1'.
x = 18

Simplifying
x = 18

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