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(108-20)4=k
We move all terms to the left:
(108-20)4-(k)=0
We add all the numbers together, and all the variables
-k+884=0
We add all the numbers together, and all the variables
-1k+884=0
We move all terms containing k to the left, all other terms to the right
-k=-884
k=-884/-1
k=+884
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