x-(-12)=3

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


Simplifying
x + -1(-12) = 3

Multiply -1 * -12
x + 12 = 3

Reorder the terms:
12 + x = 3

Solving
12 + x = 3

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 + x = 3 + -12

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

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

Simplifying
x = -9

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