2n+5-2+6n=-21

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Solution for 2n+5-2+6n=-21 equation: 



2n+5-2+6n=-21

We move all terms to the left:

2n+5-2+6n-(-21)=0

We add all the numbers together, and all the variables

8n+24=0

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

8n=-24

n=-24/8

n=-3

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