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2.50+1.78n=21.19
We move all terms to the left:
2.50+1.78n-(21.19)=0
We add all the numbers together, and all the variables
1.78n-18.69=0
We move all terms containing n to the left, all other terms to the right
1.78n=18.69
n=18.69/1.78
n=10+0.89/1.78
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