3k+7=15-k

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Solution for 3k+7=15-k equation: 



3k+7=15-k

We move all terms to the left:

3k+7-(15-k)=0

We add all the numbers together, and all the variables

3k-(-1k+15)+7=0

We get rid of parentheses

3k+1k-15+7=0

We add all the numbers together, and all the variables

4k-8=0

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

4k=8

k=8/4

k=2

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