90=17x+13x

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Solution for 90=17x+13x equation: 



90=17x+13x

We move all terms to the left:

90-(17x+13x)=0

We add all the numbers together, and all the variables

-(+30x)+90=0

We get rid of parentheses

-30x+90=0

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

-30x=-90

x=-90/-30

x=+3

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