20(n+2)=30

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Solution for 20(n+2)=30 equation: 



20(n+2)=30

We move all terms to the left:

20(n+2)-(30)=0

We multiply parentheses

20n+40-30=0

We add all the numbers together, and all the variables

20n+10=0

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

20n=-10

n=-10/20

n=-1/2

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