-20(3n+7)=40

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Solution for -20(3n+7)=40 equation: 



-20(3n+7)=40

We move all terms to the left:

-20(3n+7)-(40)=0

We multiply parentheses

-60n-140-40=0

We add all the numbers together, and all the variables

-60n-180=0

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

-60n=180

n=180/-60

n=-3

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