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3(5k+6)=-102
We move all terms to the left:
3(5k+6)-(-102)=0
We add all the numbers together, and all the variables
3(5k+6)+102=0
We multiply parentheses
15k+18+102=0
We add all the numbers together, and all the variables
15k+120=0
We move all terms containing k to the left, all other terms to the right
15k=-120
k=-120/15
k=-8
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