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k/3=-13
We move all terms to the left:
k/3-(-13)=0
We add all the numbers together, and all the variables
k/3+13=0
We multiply all the terms by the denominator
k+13*3=0
We add all the numbers together, and all the variables
k+39=0
We move all terms containing k to the left, all other terms to the right
k=-39
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