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k/9+7=63
We move all terms to the left:
k/9+7-(63)=0
We add all the numbers together, and all the variables
k/9-56=0
We multiply all the terms by the denominator
k-56*9=0
We add all the numbers together, and all the variables
k-504=0
We move all terms containing k to the left, all other terms to the right
k=504
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