90-x=30+2x

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Solution for 90-x=30+2x equation: 



90-x=30+2x

We move all terms to the left:

90-x-(30+2x)=0

We add all the numbers together, and all the variables

-x-(2x+30)+90=0

We add all the numbers together, and all the variables

-1x-(2x+30)+90=0

We get rid of parentheses

-1x-2x-30+90=0

We add all the numbers together, and all the variables

-3x+60=0

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

-3x=-60

x=-60/-3

x=+20

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