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-17.5-3k=19.73+2.1k
We move all terms to the left:
-17.5-3k-(19.73+2.1k)=0
We add all the numbers together, and all the variables
-3k-(2.1k+19.73)-17.5=0
We get rid of parentheses
-3k-2.1k-19.73-17.5=0
We add all the numbers together, and all the variables
-5.1k-37.23=0
We move all terms containing k to the left, all other terms to the right
-5.1k=37.23
k=37.23/-5.1
k=-7+1/3.3333333333333
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