90=9x+85-4x

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Solution for 90=9x+85-4x equation: 



90=9x+85-4x

We move all terms to the left:

90-(9x+85-4x)=0

We add all the numbers together, and all the variables

-(5x+85)+90=0

We get rid of parentheses

-5x-85+90=0

We add all the numbers together, and all the variables

-5x+5=0

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

-5x=-5

x=-5/-5

x=1

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