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5.6k=-20
We move all terms to the left:
5.6k-(-20)=0
We add all the numbers together, and all the variables
5.6k+20=0
We move all terms containing k to the left, all other terms to the right
5.6k=-20
k=-20/5.6
k=-3+2.66666666667/4.66666666667
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