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90=2x-4+3x-16

We move all terms to the left:

90-(2x-4+3x-16)=0

We add all the numbers together, and all the variables

-(5x-20)+90=0

We get rid of parentheses

-5x+20+90=0

We add all the numbers together, and all the variables

-5x+110=0

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

-5x=-110

x=-110/-5

x=+22

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