6n+4-7=-21

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Solution for 6n+4-7=-21 equation: 



6n+4-7=-21

We move all terms to the left:

6n+4-7-(-21)=0

We add all the numbers together, and all the variables

6n+18=0

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

6n=-18

n=-18/6

n=-3

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