3x-3x-12=7x-3x

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


Simplifying
3x + -3x + -12 = 7x + -3x

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

Combine like terms: 3x + -3x = 0
-12 + 0 = 7x + -3x
-12 = 7x + -3x

Combine like terms: 7x + -3x = 4x
-12 = 4x

Solving
-12 = 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-12 + -4x = 4x + -4x

Combine like terms: 4x + -4x = 0
-12 + -4x = 0

Add '12' to each side of the equation.
-12 + 12 + -4x = 0 + 12

Combine like terms: -12 + 12 = 0
0 + -4x = 0 + 12
-4x = 0 + 12

Combine like terms: 0 + 12 = 12
-4x = 12

Divide each side by '-4'.
x = -3

Simplifying
x = -3

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