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-7(4+k)=56
We move all terms to the left:
-7(4+k)-(56)=0
We add all the numbers together, and all the variables
-7(k+4)-56=0
We multiply parentheses
-7k-28-56=0
We add all the numbers together, and all the variables
-7k-84=0
We move all terms containing k to the left, all other terms to the right
-7k=84
k=84/-7
k=-12
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