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1.75+0.75n=20
We move all terms to the left:
1.75+0.75n-(20)=0
We add all the numbers together, and all the variables
0.75n-18.25=0
We move all terms containing n to the left, all other terms to the right
0.75n=18.25
n=18.25/0.75
n=24+0.25/0.75
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