90=3x-8+4x

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Solution for 90=3x-8+4x equation: 



90=3x-8+4x

We move all terms to the left:

90-(3x-8+4x)=0

We add all the numbers together, and all the variables

-(7x-8)+90=0

We get rid of parentheses

-7x+8+90=0

We add all the numbers together, and all the variables

-7x+98=0

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

-7x=-98

x=-98/-7

x=+14

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