6x+6x=90-x

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Solution for 6x+6x=90-x equation: 


Simplifying
6x + 6x = 90 + -1x

Combine like terms: 6x + 6x = 12x
12x = 90 + -1x

Solving
12x = 90 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
12x + x = 90 + -1x + x

Combine like terms: 12x + x = 13x
13x = 90 + -1x + x

Combine like terms: -1x + x = 0
13x = 90 + 0
13x = 90

Divide each side by '13'.
x = 6.923076923

Simplifying
x = 6.923076923

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