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13=4k+2/2
We move all terms to the left:
13-(4k+2/2)=0
We add all the numbers together, and all the variables
-(4k+1)+13=0
We get rid of parentheses
-4k-1+13=0
We add all the numbers together, and all the variables
-4k+12=0
We move all terms containing k to the left, all other terms to the right
-4k=-12
k=-12/-4
k=+3
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