21+2k=7(8k+3)-5k

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Solution for 21+2k=7(8k+3)-5k equation: 



21+2k=7(8k+3)-5k

We move all terms to the left:

21+2k-(7(8k+3)-5k)=0



We calculate terms in parentheses: -(7(8k+3)-5k), so:

7(8k+3)-5k

We add all the numbers together, and all the variables

-5k+7(8k+3)

We multiply parentheses

-5k+56k+21

We add all the numbers together, and all the variables

51k+21

Back to the equation:

-(51k+21)



We get rid of parentheses

2k-51k-21+21=0

We add all the numbers together, and all the variables

-49k=0

k=0/-49

k=0

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