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3(k+1)+k=-37
We move all terms to the left:
3(k+1)+k-(-37)=0
We add all the numbers together, and all the variables
k+3(k+1)+37=0
We multiply parentheses
k+3k+3+37=0
We add all the numbers together, and all the variables
4k+40=0
We move all terms containing k to the left, all other terms to the right
4k=-40
k=-40/4
k=-10
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