3k+7=21+2k

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Solution for 3k+7=21+2k equation: 



3k+7=21+2k

We move all terms to the left:

3k+7-(21+2k)=0

We add all the numbers together, and all the variables

3k-(2k+21)+7=0

We get rid of parentheses

3k-2k-21+7=0

We add all the numbers together, and all the variables

k-14=0

We move all terms containing k to the left, all other terms to the right

k=14

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