90-9x=7x-20

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Solution for 90-9x=7x-20 equation: 



90-9x=7x-20

We move all terms to the left:

90-9x-(7x-20)=0

We get rid of parentheses

-9x-7x+20+90=0

We add all the numbers together, and all the variables

-16x+110=0

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

-16x=-110

x=-110/-16

x=6+7/8

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