3x-x+7x+12=3x+9

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Solution for 3x-x+7x+12=3x+9 equation:


Simplifying
3x + -1x + 7x + 12 = 3x + 9

Reorder the terms:
12 + 3x + -1x + 7x = 3x + 9

Combine like terms: 3x + -1x = 2x
12 + 2x + 7x = 3x + 9

Combine like terms: 2x + 7x = 9x
12 + 9x = 3x + 9

Reorder the terms:
12 + 9x = 9 + 3x

Solving
12 + 9x = 9 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
12 + 9x + -3x = 9 + 3x + -3x

Combine like terms: 9x + -3x = 6x
12 + 6x = 9 + 3x + -3x

Combine like terms: 3x + -3x = 0
12 + 6x = 9 + 0
12 + 6x = 9

Add '-12' to each side of the equation.
12 + -12 + 6x = 9 + -12

Combine like terms: 12 + -12 = 0
0 + 6x = 9 + -12
6x = 9 + -12

Combine like terms: 9 + -12 = -3
6x = -3

Divide each side by '6'.
x = -0.5

Simplifying
x = -0.5

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