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45=k/2
We move all terms to the left:
45-(k/2)=0
We add all the numbers together, and all the variables
-(+k/2)+45=0
We get rid of parentheses
-k/2+45=0
We multiply all the terms by the denominator
-k+45*2=0
We add all the numbers together, and all the variables
-1k+90=0
We move all terms containing k to the left, all other terms to the right
-k=-90
k=-90/-1
k=+90
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