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15k+19=13k-19
We move all terms to the left:
15k+19-(13k-19)=0
We get rid of parentheses
15k-13k+19+19=0
We add all the numbers together, and all the variables
2k+38=0
We move all terms containing k to the left, all other terms to the right
2k=-38
k=-38/2
k=-19
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