21=-4(9x+8)

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Solution for 21=-4(9x+8) equation: 



21=-4(9x+8)

We move all terms to the left:

21-(-4(9x+8))=0



We calculate terms in parentheses: -(-4(9x+8)), so:

-4(9x+8)

We multiply parentheses

-36x-32

Back to the equation:

-(-36x-32)



We get rid of parentheses

36x+32+21=0

We add all the numbers together, and all the variables

36x+53=0

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

36x=-53

x=-53/36

x=-1+17/36

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