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9.k+3.5+4.8k=-46.2
We move all terms to the left:
9.k+3.5+4.8k-(-46.2)=0
We add all the numbers together, and all the variables
13.8k+49.7=0
We move all terms containing k to the left, all other terms to the right
13.8k=-49.7
k=-49.7/13.8
k=-3+6.3846153846154/10.615384615385
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