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15-5n/2=40
We move all terms to the left:
15-5n/2-(40)=0
We add all the numbers together, and all the variables
-5n/2-25=0
We multiply all the terms by the denominator
-5n-25*2=0
We add all the numbers together, and all the variables
-5n-50=0
We move all terms containing n to the left, all other terms to the right
-5n=50
n=50/-5
n=-10
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