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40=k/5
We move all terms to the left:
40-(k/5)=0
We add all the numbers together, and all the variables
-(+k/5)+40=0
We get rid of parentheses
-k/5+40=0
We multiply all the terms by the denominator
-k+40*5=0
We add all the numbers together, and all the variables
-1k+200=0
We move all terms containing k to the left, all other terms to the right
-k=-200
k=-200/-1
k=+200
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