1+3k=9+k

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Solution for 1+3k=9+k equation: 



1+3k=9+k

We move all terms to the left:

1+3k-(9+k)=0

We add all the numbers together, and all the variables

3k-(k+9)+1=0

We get rid of parentheses

3k-k-9+1=0

We add all the numbers together, and all the variables

2k-8=0

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

2k=8

k=8/2

k=4

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