-(x+3)=12

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


Simplifying
-1(x + 3) = 12

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

Solving
-3 + -1x = 12

Solving for variable 'x'.

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

Add '3' to each side of the equation.
-3 + 3 + -1x = 12 + 3

Combine like terms: -3 + 3 = 0
0 + -1x = 12 + 3
-1x = 12 + 3

Combine like terms: 12 + 3 = 15
-1x = 15

Divide each side by '-1'.
x = -15

Simplifying
x = -15

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