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3k-1=-9+2k
We move all terms to the left:
3k-1-(-9+2k)=0
We add all the numbers together, and all the variables
3k-(2k-9)-1=0
We get rid of parentheses
3k-2k+9-1=0
We add all the numbers together, and all the variables
k+8=0
We move all terms containing k to the left, all other terms to the right
k=-8
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