1+2k+5k=15

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Solution for 1+2k+5k=15 equation: 



1+2k+5k=15

We move all terms to the left:

1+2k+5k-(15)=0

We add all the numbers together, and all the variables

7k-14=0

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

7k=14

k=14/7

k=2

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