x=90-8x-20

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Solution for x=90-8x-20 equation: 



x=90-8x-20

We move all terms to the left:

x-(90-8x-20)=0

We add all the numbers together, and all the variables

x-(-8x+70)=0

We get rid of parentheses

x+8x-70=0

We add all the numbers together, and all the variables

9x-70=0

We move all terms containing x to the left, all other terms to the right

9x=70

x=70/9

x=7+7/9

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