(2x-57)+x=90

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Solution for (2x-57)+x=90 equation: 



(2x-57)+x=90

We move all terms to the left:

(2x-57)+x-(90)=0

We add all the numbers together, and all the variables

x+(2x-57)-90=0

We get rid of parentheses

x+2x-57-90=0

We add all the numbers together, and all the variables

3x-147=0

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

3x=147

x=147/3

x=49

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