n/2*(21+3)=720

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Solution for n/2*(21+3)=720 equation: 



n/2(21+3)=720

We move all terms to the left:

n/2(21+3)-(720)=0

We add all the numbers together, and all the variables

n/224-720=0

We multiply all the terms by the denominator


n-720*224=0

We add all the numbers together, and all the variables

n-161280=0

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

n=161280

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