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(3x+90)=3x
We move all terms to the left:
(3x+90)-(3x)=0
We add all the numbers together, and all the variables
-3x+(3x+90)=0
We get rid of parentheses
-3x+3x+90=0
We add all the numbers together, and all the variables
90!=0
There is no solution for this equation
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