3(5k+1)=3k+21

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Solution for 3(5k+1)=3k+21 equation: 



3(5k+1)=3k+21

We move all terms to the left:

3(5k+1)-(3k+21)=0

We multiply parentheses

15k-(3k+21)+3=0

We get rid of parentheses

15k-3k-21+3=0

We add all the numbers together, and all the variables

12k-18=0

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

12k=18

k=18/12

k=1+1/2

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