4x-90=x+90

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



4x-90=x+90

We move all terms to the left:

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

We get rid of parentheses

4x-x-90-90=0

We add all the numbers together, and all the variables

3x-180=0

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

3x=180

x=180/3

x=60

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