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9.1x+900=82.81+30x
We move all terms to the left:
9.1x+900-(82.81+30x)=0
We add all the numbers together, and all the variables
9.1x-(30x+82.81)+900=0
We get rid of parentheses
9.1x-30x-82.81+900=0
We add all the numbers together, and all the variables
-20.9x+817.19=0
We move all terms containing x to the left, all other terms to the right
-20.9x=-817.19
x=-817.19/-20.9
x=39+1/10
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