30-2n=40

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Solution for 30-2n=40 equation: 



30-2n=40

We move all terms to the left:

30-2n-(40)=0

We add all the numbers together, and all the variables

-2n-10=0

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

-2n=10

n=10/-2

n=-5

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