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8k+40=40+8k
We move all terms to the left:
8k+40-(40+8k)=0
We add all the numbers together, and all the variables
8k-(8k+40)+40=0
We get rid of parentheses
8k-8k-40+40=0
We add all the numbers together, and all the variables
=0
k=0/1
k=0
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