3-x=12+x

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Solution for 3-x=12+x equation:


Simplifying
3 + -1x = 12 + x

Solving
3 + -1x = 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 + -1x = 12 + x + -1x

Combine like terms: -1x + -1x = -2x
3 + -2x = 12 + x + -1x

Combine like terms: x + -1x = 0
3 + -2x = 12 + 0
3 + -2x = 12

Add '-3' to each side of the equation.
3 + -3 + -2x = 12 + -3

Combine like terms: 3 + -3 = 0
0 + -2x = 12 + -3
-2x = 12 + -3

Combine like terms: 12 + -3 = 9
-2x = 9

Divide each side by '-2'.
x = -4.5

Simplifying
x = -4.5

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