7n+21=-2n-3

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Solution for 7n+21=-2n-3 equation: 



7n+21=-2n-3

We move all terms to the left:

7n+21-(-2n-3)=0

We get rid of parentheses

7n+2n+3+21=0

We add all the numbers together, and all the variables

9n+24=0

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

9n=-24

n=-24/9

n=-2+2/3

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