X-13+90=3x+7

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Solution for X-13+90=3x+7 equation: 



X-13+90=3X+7

We move all terms to the left:

X-13+90-(3X+7)=0

We add all the numbers together, and all the variables

X-(3X+7)+77=0

We get rid of parentheses

X-3X-7+77=0

We add all the numbers together, and all the variables

-2X+70=0

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

-2X=-70

X=-70/-2

X=+35

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