2+4n-7=-21

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Solution for 2+4n-7=-21 equation: 



2+4n-7=-21

We move all terms to the left:

2+4n-7-(-21)=0

We add all the numbers together, and all the variables

4n+16=0

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

4n=-16

n=-16/4

n=-4

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