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5-k=12+16
We move all terms to the left:
5-k-(12+16)=0
We add all the numbers together, and all the variables
-k+5-28=0
We add all the numbers together, and all the variables
-1k-23=0
We move all terms containing k to the left, all other terms to the right
-k=23
k=23/-1
k=-23
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