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19.5=4k-6k
We move all terms to the left:
19.5-(4k-6k)=0
We add all the numbers together, and all the variables
-(-2k)+19.5=0
We get rid of parentheses
2k+19.5=0
We move all terms containing k to the left, all other terms to the right
2k=-19.5
k=-19.5/2
k=-9+1/1.3333333333333
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