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7(-10+n)=-49
We move all terms to the left:
7(-10+n)-(-49)=0
We add all the numbers together, and all the variables
7(n-10)-(-49)=0
We add all the numbers together, and all the variables
7(n-10)+49=0
We multiply parentheses
7n-70+49=0
We add all the numbers together, and all the variables
7n-21=0
We move all terms containing n to the left, all other terms to the right
7n=21
n=21/7
n=3
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