7=45-3(12-x)

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Solution for 7=45-3(12-x) equation: 



7=45-3(12-x)

We move all terms to the left:

7-(45-3(12-x))=0

We add all the numbers together, and all the variables

-(45-3(-1x+12))+7=0



We calculate terms in parentheses: -(45-3(-1x+12)), so:

45-3(-1x+12)

determiningTheFunctionDomain
-3(-1x+12)+45

We multiply parentheses

3x-36+45

We add all the numbers together, and all the variables

3x+9

Back to the equation:

-(3x+9)



We get rid of parentheses

-3x-9+7=0

We add all the numbers together, and all the variables

-3x-2=0

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

-3x=2

x=2/-3

x=-2/3

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