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-30+6k=28k+20
We move all terms to the left:
-30+6k-(28k+20)=0
We get rid of parentheses
6k-28k-20-30=0
We add all the numbers together, and all the variables
-22k-50=0
We move all terms containing k to the left, all other terms to the right
-22k=50
k=50/-22
k=-2+3/11
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