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-9(-4+n)=-54
We move all terms to the left:
-9(-4+n)-(-54)=0
We add all the numbers together, and all the variables
-9(n-4)-(-54)=0
We add all the numbers together, and all the variables
-9(n-4)+54=0
We multiply parentheses
-9n+36+54=0
We add all the numbers together, and all the variables
-9n+90=0
We move all terms containing n to the left, all other terms to the right
-9n=-90
n=-90/-9
n=+10
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