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-3+k*15=4
We move all terms to the left:
-3+k*15-(4)=0
We add all the numbers together, and all the variables
k*15-7=0
Wy multiply elements
15k-7=0
We move all terms containing k to the left, all other terms to the right
15k=7
k=7/15
k=7/15
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