9x-21=-2(x-10)+80

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Solution for 9x-21=-2(x-10)+80 equation: 



9x-21=-2(x-10)+80

We move all terms to the left:

9x-21-(-2(x-10)+80)=0



We calculate terms in parentheses: -(-2(x-10)+80), so:

-2(x-10)+80

We multiply parentheses

-2x+20+80

We add all the numbers together, and all the variables

-2x+100

Back to the equation:

-(-2x+100)



We get rid of parentheses

9x+2x-100-21=0

We add all the numbers together, and all the variables

11x-121=0

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

11x=121

x=121/11

x=11

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