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(162+a)/4=55
We move all terms to the left:
(162+a)/4-(55)=0
We add all the numbers together, and all the variables
(a+162)/4-55=0
We multiply all the terms by the denominator
(a+162)-55*4=0
We add all the numbers together, and all the variables
(a+162)-220=0
We get rid of parentheses
a+162-220=0
We add all the numbers together, and all the variables
a-58=0
We move all terms containing a to the left, all other terms to the right
a=58
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