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-0.7n=7.21
We move all terms to the left:
-0.7n-(7.21)=0
We add all the numbers together, and all the variables
-0.7n-7.21=0
We move all terms containing n to the left, all other terms to the right
-0.7n=7.21
n=7.21/-0.7
n=-10+0.21/0.7
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