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k-3(2k-3)=45
We move all terms to the left:
k-3(2k-3)-(45)=0
We multiply parentheses
k-6k+9-45=0
We add all the numbers together, and all the variables
-5k-36=0
We move all terms containing k to the left, all other terms to the right
-5k=36
k=36/-5
k=-7+1/5
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