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k=84-12/8
We move all terms to the left:
k-(84-12/8)=0
We add all the numbers together, and all the variables
k-(-12/8+84)=0
We get rid of parentheses
k-84+12/8=0
We multiply all the terms by the denominator
k*8+12-84*8=0
We add all the numbers together, and all the variables
k*8-660=0
Wy multiply elements
8k-660=0
We move all terms containing k to the left, all other terms to the right
8k=660
k=660/8
k=82+1/2
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