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(15+a)/3=5
We move all terms to the left:
(15+a)/3-(5)=0
We add all the numbers together, and all the variables
(a+15)/3-5=0
We multiply all the terms by the denominator
(a+15)-5*3=0
We add all the numbers together, and all the variables
(a+15)-15=0
We get rid of parentheses
a+15-15=0
We add all the numbers together, and all the variables
a=0
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