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7(n/4-1)=28
We move all terms to the left:
7(n/4-1)-(28)=0
We multiply parentheses
7n-7-28=0
We add all the numbers together, and all the variables
7n-35=0
We move all terms containing n to the left, all other terms to the right
7n=35
n=35/7
n=5
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