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9.88-5.2k=-8.4k-9.96
We move all terms to the left:
9.88-5.2k-(-8.4k-9.96)=0
We get rid of parentheses
-5.2k+8.4k+9.96+9.88=0
We add all the numbers together, and all the variables
3.2k+19.84=0
We move all terms containing k to the left, all other terms to the right
3.2k=-19.84
k=-19.84/3.2
k=-6+0.64/3.2
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