3x-12=7+x

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Solution for 3x-12=7+x equation:


Simplifying
3x + -12 = 7 + x

Reorder the terms:
-12 + 3x = 7 + x

Solving
-12 + 3x = 7 + 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.
-12 + 3x + -1x = 7 + x + -1x

Combine like terms: 3x + -1x = 2x
-12 + 2x = 7 + x + -1x

Combine like terms: x + -1x = 0
-12 + 2x = 7 + 0
-12 + 2x = 7

Add '12' to each side of the equation.
-12 + 12 + 2x = 7 + 12

Combine like terms: -12 + 12 = 0
0 + 2x = 7 + 12
2x = 7 + 12

Combine like terms: 7 + 12 = 19
2x = 19

Divide each side by '2'.
x = 9.5

Simplifying
x = 9.5

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