13=12x-9x-x-x

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Solution for 13=12x-9x-x-x equation:


Simplifying
13 = 12x + -9x + -1x + -1x

Combine like terms: 12x + -9x = 3x
13 = 3x + -1x + -1x

Combine like terms: 3x + -1x = 2x
13 = 2x + -1x

Combine like terms: 2x + -1x = 1x
13 = 1x

Solving
13 = 1x

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.
13 + -1x = 1x + -1x

Combine like terms: 1x + -1x = 0
13 + -1x = 0

Add '-13' to each side of the equation.
13 + -13 + -1x = 0 + -13

Combine like terms: 13 + -13 = 0
0 + -1x = 0 + -13
-1x = 0 + -13

Combine like terms: 0 + -13 = -13
-1x = -13

Divide each side by '-1'.
x = 13

Simplifying
x = 13

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