-21+7+n=-9+16

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Solution for -21+7+n=-9+16 equation: 



-21+7+n=-9+16

We move all terms to the left:

-21+7+n-(-9+16)=0

We add all the numbers together, and all the variables

n-21+7-7=0

We add all the numbers together, and all the variables

n-21=0

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

n=21

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