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78=2+5n
We move all terms to the left:
78-(2+5n)=0
We add all the numbers together, and all the variables
-(5n+2)+78=0
We get rid of parentheses
-5n-2+78=0
We add all the numbers together, and all the variables
-5n+76=0
We move all terms containing n to the left, all other terms to the right
-5n=-76
n=-76/-5
n=15+1/5
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