4x-12=15+x

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Solution for 4x-12=15+x equation:


Simplifying
4x + -12 = 15 + x

Reorder the terms:
-12 + 4x = 15 + x

Solving
-12 + 4x = 15 + 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 + 4x + -1x = 15 + x + -1x

Combine like terms: 4x + -1x = 3x
-12 + 3x = 15 + x + -1x

Combine like terms: x + -1x = 0
-12 + 3x = 15 + 0
-12 + 3x = 15

Add '12' to each side of the equation.
-12 + 12 + 3x = 15 + 12

Combine like terms: -12 + 12 = 0
0 + 3x = 15 + 12
3x = 15 + 12

Combine like terms: 15 + 12 = 27
3x = 27

Divide each side by '3'.
x = 9

Simplifying
x = 9

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