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90=9x+31+2x+22
We move all terms to the left:
90-(9x+31+2x+22)=0
We add all the numbers together, and all the variables
-(11x+53)+90=0
We get rid of parentheses
-11x-53+90=0
We add all the numbers together, and all the variables
-11x+37=0
We move all terms containing x to the left, all other terms to the right
-11x=-37
x=-37/-11
x=3+4/11
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