n+7+n+2n-12+3n+4=90-n

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Solution for n+7+n+2n-12+3n+4=90-n equation: 



n+7+n+2n-12+3n+4=90-n

We move all terms to the left:

n+7+n+2n-12+3n+4-(90-n)=0

We add all the numbers together, and all the variables

n+n+2n+3n-(-1n+90)+7-12+4=0

We add all the numbers together, and all the variables

7n-(-1n+90)-1=0

We get rid of parentheses

7n+1n-90-1=0

We add all the numbers together, and all the variables

8n-91=0

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

8n=91

n=91/8

n=11+3/8

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