12x-x+4=9x-9

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Solution for 12x-x+4=9x-9 equation:


Simplifying
12x + -1x + 4 = 9x + -9

Reorder the terms:
4 + 12x + -1x = 9x + -9

Combine like terms: 12x + -1x = 11x
4 + 11x = 9x + -9

Reorder the terms:
4 + 11x = -9 + 9x

Solving
4 + 11x = -9 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
4 + 11x + -9x = -9 + 9x + -9x

Combine like terms: 11x + -9x = 2x
4 + 2x = -9 + 9x + -9x

Combine like terms: 9x + -9x = 0
4 + 2x = -9 + 0
4 + 2x = -9

Add '-4' to each side of the equation.
4 + -4 + 2x = -9 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = -9 + -4
2x = -9 + -4

Combine like terms: -9 + -4 = -13
2x = -13

Divide each side by '2'.
x = -6.5

Simplifying
x = -6.5

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