90=4x-10+2x-20

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Solution for 90=4x-10+2x-20 equation: 



90=4x-10+2x-20

We move all terms to the left:

90-(4x-10+2x-20)=0

We add all the numbers together, and all the variables

-(6x-30)+90=0

We get rid of parentheses

-6x+30+90=0

We add all the numbers together, and all the variables

-6x+120=0

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

-6x=-120

x=-120/-6

x=+20

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