12x+3(9+x)=57

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Solution for 12x+3(9+x)=57 equation: 



12x+3(9+x)=57

We move all terms to the left:

12x+3(9+x)-(57)=0

We add all the numbers together, and all the variables

12x+3(x+9)-57=0

We multiply parentheses

12x+3x+27-57=0

We add all the numbers together, and all the variables

15x-30=0

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

15x=30

x=30/15

x=2

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