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(2x-49)+(55)=90
We move all terms to the left:
(2x-49)+(55)-(90)=0
We add all the numbers together, and all the variables
(2x-49)-35=0
We get rid of parentheses
2x-49-35=0
We add all the numbers together, and all the variables
2x-84=0
We move all terms containing x to the left, all other terms to the right
2x=84
x=84/2
x=42
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