6x+6-4x=12+7x-21

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Solution for 6x+6-4x=12+7x-21 equation:


Simplifying
6x + 6 + -4x = 12 + 7x + -21

Reorder the terms:
6 + 6x + -4x = 12 + 7x + -21

Combine like terms: 6x + -4x = 2x
6 + 2x = 12 + 7x + -21

Reorder the terms:
6 + 2x = 12 + -21 + 7x

Combine like terms: 12 + -21 = -9
6 + 2x = -9 + 7x

Solving
6 + 2x = -9 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
6 + 2x + -7x = -9 + 7x + -7x

Combine like terms: 2x + -7x = -5x
6 + -5x = -9 + 7x + -7x

Combine like terms: 7x + -7x = 0
6 + -5x = -9 + 0
6 + -5x = -9

Add '-6' to each side of the equation.
6 + -6 + -5x = -9 + -6

Combine like terms: 6 + -6 = 0
0 + -5x = -9 + -6
-5x = -9 + -6

Combine like terms: -9 + -6 = -15
-5x = -15

Divide each side by '-5'.
x = 3

Simplifying
x = 3

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