54=3(7-x)

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Solution for 54=3(7-x) equation: 



54=3(7-x)

We move all terms to the left:

54-(3(7-x))=0

We add all the numbers together, and all the variables

-(3(-1x+7))+54=0



We calculate terms in parentheses: -(3(-1x+7)), so:

3(-1x+7)

We multiply parentheses

-3x+21

Back to the equation:

-(-3x+21)



We get rid of parentheses

3x-21+54=0

We add all the numbers together, and all the variables

3x+33=0

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

3x=-33

x=-33/3

x=-11

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