7(2n-9)+28=21

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Solution for 7(2n-9)+28=21 equation: 



7(2n-9)+28=21

We move all terms to the left:

7(2n-9)+28-(21)=0

We add all the numbers together, and all the variables

7(2n-9)+7=0

We multiply parentheses

14n-63+7=0

We add all the numbers together, and all the variables

14n-56=0

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

14n=56

n=56/14

n=4

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