5(n-3)=20

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Solution for 5(n-3)=20 equation: 



5(n-3)=20

We move all terms to the left:

5(n-3)-(20)=0

We multiply parentheses

5n-15-20=0

We add all the numbers together, and all the variables

5n-35=0

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

5n=35

n=35/5

n=7

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