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(61+x)/5=81
We move all terms to the left:
(61+x)/5-(81)=0
We add all the numbers together, and all the variables
(x+61)/5-81=0
We multiply all the terms by the denominator
(x+61)-81*5=0
We add all the numbers together, and all the variables
(x+61)-405=0
We get rid of parentheses
x+61-405=0
We add all the numbers together, and all the variables
x-344=0
We move all terms containing x to the left, all other terms to the right
x=344
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