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-3+k/15=-1
We move all terms to the left:
-3+k/15-(-1)=0
We add all the numbers together, and all the variables
k/15-2=0
We multiply all the terms by the denominator
k-2*15=0
We add all the numbers together, and all the variables
k-30=0
We move all terms containing k to the left, all other terms to the right
k=30
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