90=2n+48

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Solution for 90=2n+48 equation: 



90=2n+48

We move all terms to the left:

90-(2n+48)=0

We get rid of parentheses

-2n-48+90=0

We add all the numbers together, and all the variables

-2n+42=0

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

-2n=-42

n=-42/-2

n=+21

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