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-123.5=4-8.5k
We move all terms to the left:
-123.5-(4-8.5k)=0
We add all the numbers together, and all the variables
-(-8.5k+4)-123.5=0
We get rid of parentheses
8.5k-4-123.5=0
We add all the numbers together, and all the variables
8.5k-127.5=0
We move all terms containing k to the left, all other terms to the right
8.5k=127.5
k=127.5/8.5
k=15
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