31-19=3(x-9)

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Solution for 31-19=3(x-9) equation: 



31-19=3(x-9)

We move all terms to the left:

31-19-(3(x-9))=0

We add all the numbers together, and all the variables

-(3(x-9))+12=0



We calculate terms in parentheses: -(3(x-9)), so:

3(x-9)

We multiply parentheses

3x-27

Back to the equation:

-(3x-27)



We get rid of parentheses

-3x+27+12=0

We add all the numbers together, and all the variables

-3x+39=0

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

-3x=-39

x=-39/-3

x=+13

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