(3+n)(7)=-28

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Solution for (3+n)(7)=-28 equation: 



(3+n)(7)=-28

We move all terms to the left:

(3+n)(7)-(-28)=0

We add all the numbers together, and all the variables

(n+3)7-(-28)=0

We add all the numbers together, and all the variables

(n+3)7+28=0

We multiply parentheses

7n+21+28=0

We add all the numbers together, and all the variables

7n+49=0

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

7n=-49

n=-49/7

n=-7

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