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(a+8)/4=7
We move all terms to the left:
(a+8)/4-(7)=0
We multiply all the terms by the denominator
(a+8)-7*4=0
We add all the numbers together, and all the variables
(a+8)-28=0
We get rid of parentheses
a+8-28=0
We add all the numbers together, and all the variables
a-20=0
We move all terms containing a to the left, all other terms to the right
a=20
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