x=6-(21-4x)

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Solution for x=6-(21-4x) equation: 



x=6-(21-4x)

We move all terms to the left:

x-(6-(21-4x))=0

We add all the numbers together, and all the variables

x-(6-(-4x+21))=0



We calculate terms in parentheses: -(6-(-4x+21)), so:

6-(-4x+21)

determiningTheFunctionDomain
-(-4x+21)+6

We get rid of parentheses

4x-21+6

We add all the numbers together, and all the variables

4x-15

Back to the equation:

-(4x-15)



We get rid of parentheses

x-4x+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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