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4(k-3)-5k=75
We move all terms to the left:
4(k-3)-5k-(75)=0
We add all the numbers together, and all the variables
-5k+4(k-3)-75=0
We multiply parentheses
-5k+4k-12-75=0
We add all the numbers together, and all the variables
-1k-87=0
We move all terms containing k to the left, all other terms to the right
-k=87
k=87/-1
k=-87
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