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a+(36-a)/3=20
We move all terms to the left:
a+(36-a)/3-(20)=0
We add all the numbers together, and all the variables
a+(-1a+36)/3-20=0
We multiply all the terms by the denominator
a*3+(-1a+36)-20*3=0
We add all the numbers together, and all the variables
a*3+(-1a+36)-60=0
Wy multiply elements
3a+(-1a+36)-60=0
We get rid of parentheses
3a-1a+36-60=0
We add all the numbers together, and all the variables
2a-24=0
We move all terms containing a to the left, all other terms to the right
2a=24
a=24/2
a=12
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