3x-2(x+21)=20+5x-(-8)

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Solution for 3x-2(x+21)=20+5x-(-8) equation: 



3x-2(x+21)=20+5x-(-8)

We move all terms to the left:

3x-2(x+21)-(20+5x-(-8))=0

We multiply parentheses

3x-2x-(20+5x-(-8))-42=0



We calculate terms in parentheses: -(20+5x-(-8)), so:

20+5x-(-8)

determiningTheFunctionDomain
5x+20-(-8)

We add all the numbers together, and all the variables

5x+28

Back to the equation:

-(5x+28)



We add all the numbers together, and all the variables

x-(5x+28)-42=0

We get rid of parentheses

x-5x-28-42=0

We add all the numbers together, and all the variables

-4x-70=0

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

-4x=70

x=70/-4

x=-17+1/2

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