3x-12=x+18

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Solution for 3x-12=x+18 equation:


Simplifying
3x + -12 = x + 18

Reorder the terms:
-12 + 3x = x + 18

Reorder the terms:
-12 + 3x = 18 + x

Solving
-12 + 3x = 18 + 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 = 18 + x + -1x

Combine like terms: 3x + -1x = 2x
-12 + 2x = 18 + x + -1x

Combine like terms: x + -1x = 0
-12 + 2x = 18 + 0
-12 + 2x = 18

Add '12' to each side of the equation.
-12 + 12 + 2x = 18 + 12

Combine like terms: -12 + 12 = 0
0 + 2x = 18 + 12
2x = 18 + 12

Combine like terms: 18 + 12 = 30
2x = 30

Divide each side by '2'.
x = 15

Simplifying
x = 15

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