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-3(3k+5)-10+k=15
We move all terms to the left:
-3(3k+5)-10+k-(15)=0
We add all the numbers together, and all the variables
k-3(3k+5)-25=0
We multiply parentheses
k-9k-15-25=0
We add all the numbers together, and all the variables
-8k-40=0
We move all terms containing k to the left, all other terms to the right
-8k=40
k=40/-8
k=-5
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