20=16-4(x+3)

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Solution for 20=16-4(x+3) equation: 



20=16-4(x+3)

We move all terms to the left:

20-(16-4(x+3))=0



We calculate terms in parentheses: -(16-4(x+3)), so:

16-4(x+3)

determiningTheFunctionDomain
-4(x+3)+16

We multiply parentheses

-4x-12+16

We add all the numbers together, and all the variables

-4x+4

Back to the equation:

-(-4x+4)



We get rid of parentheses

4x-4+20=0

We add all the numbers together, and all the variables

4x+16=0

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

4x=-16

x=-16/4

x=-4

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