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-2.5k=-8.75
We move all terms to the left:
-2.5k-(-8.75)=0
We add all the numbers together, and all the variables
-2.5k+8.75=0
We move all terms containing k to the left, all other terms to the right
-2.5k=-8.75
k=-8.75/-2.5
k=3+1/2
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