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+2=2K+7
We move all terms to the left:
+2-(2K+7)=0
We get rid of parentheses
-2K-7+2=0
We add all the numbers together, and all the variables
-2K-5=0
We move all terms containing K to the left, all other terms to the right
-2K=5
K=5/-2
K=-2+1/2
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