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0.7n-6-0.3n=6.8
We move all terms to the left:
0.7n-6-0.3n-(6.8)=0
We add all the numbers together, and all the variables
0.4n-12.8=0
We move all terms containing n to the left, all other terms to the right
0.4n=12.8
n=12.8/0.4
n=32
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