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5(7n-3)-3=87
We move all terms to the left:
5(7n-3)-3-(87)=0
We add all the numbers together, and all the variables
5(7n-3)-90=0
We multiply parentheses
35n-15-90=0
We add all the numbers together, and all the variables
35n-105=0
We move all terms containing n to the left, all other terms to the right
35n=105
n=105/35
n=3
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