21=5n-2(2-3)

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Solution for 21=5n-2(2-3) equation: 



21=5n-2(2-3)

We move all terms to the left:

21-(5n-2(2-3))=0

We add all the numbers together, and all the variables

-(5n-2(-1))+21=0



We calculate terms in parentheses: -(5n-2(-1)), so:

5n-2(-1)

We add all the numbers together, and all the variables

5n+2

Back to the equation:

-(5n+2)



We get rid of parentheses

-5n-2+21=0

We add all the numbers together, and all the variables

-5n+19=0

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

-5n=-19

n=-19/-5

n=3+4/5

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