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