-3=12+x

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Solution for -3=12+x equation:


Simplifying
-3 = 12 + x

Solving
-3 = 12 + x

Solving for variable 'x'.

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

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

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

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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