90=7x+1+9x-7

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Solution for 90=7x+1+9x-7 equation: 



90=7x+1+9x-7

We move all terms to the left:

90-(7x+1+9x-7)=0

We add all the numbers together, and all the variables

-(16x-6)+90=0

We get rid of parentheses

-16x+6+90=0

We add all the numbers together, and all the variables

-16x+96=0

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

-16x=-96

x=-96/-16

x=+6

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