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

18k-18=0

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

18k=18

k=18/18

k=1

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