90+x=3x-4

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



90+x=3x-4

We move all terms to the left:

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

We get rid of parentheses

x-3x+4+90=0

We add all the numbers together, and all the variables

-2x+94=0

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

-2x=-94

x=-94/-2

x=+47

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