40=2n+30

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Solution for 40=2n+30 equation: 



40=2n+30

We move all terms to the left:

40-(2n+30)=0

We get rid of parentheses

-2n-30+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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