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0.7(n-8)=7
We move all terms to the left:
0.7(n-8)-(7)=0
We multiply parentheses
0.7n-5.6-7=0
We add all the numbers together, and all the variables
0.7n-12.6=0
We move all terms containing n to the left, all other terms to the right
0.7n=12.6
n=12.6/0.7
n=18
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