4(n+5)=40

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Solution for 4(n+5)=40 equation: 



4(n+5)=40

We move all terms to the left:

4(n+5)-(40)=0

We multiply parentheses

4n+20-40=0

We add all the numbers together, and all the variables

4n-20=0

We move all terms containing n to the left, all other terms to the right

4n=20

n=20/4

n=5

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