21x=3(8x+5)

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Solution for 21x=3(8x+5) equation: 



21x=3(8x+5)

We move all terms to the left:

21x-(3(8x+5))=0



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

3(8x+5)

We multiply parentheses

24x+15

Back to the equation:

-(24x+15)



We get rid of parentheses

21x-24x-15=0

We add all the numbers together, and all the variables

-3x-15=0

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

-3x=15

x=15/-3

x=-5

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