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-3=-7+k/2
We move all terms to the left:
-3-(-7+k/2)=0
We add all the numbers together, and all the variables
-(k/2-7)-3=0
We get rid of parentheses
-k/2+7-3=0
We multiply all the terms by the denominator
-k+7*2-3*2=0
We add all the numbers together, and all the variables
-1k+8=0
We move all terms containing k to the left, all other terms to the right
-k=-8
k=-8/-1
k=+8
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