x-7=21-4(x-3)

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Solution for x-7=21-4(x-3) equation: 



x-7=21-4(x-3)

We move all terms to the left:

x-7-(21-4(x-3))=0



We calculate terms in parentheses: -(21-4(x-3)), so:

21-4(x-3)

determiningTheFunctionDomain
-4(x-3)+21

We multiply parentheses

-4x+12+21

We add all the numbers together, and all the variables

-4x+33

Back to the equation:

-(-4x+33)



We get rid of parentheses

x+4x-33-7=0

We add all the numbers together, and all the variables

5x-40=0

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

5x=40

x=40/5

x=8

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