3(x-4)=9x-42

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Solution for 3(x-4)=9x-42 equation: 



3(x-4)=9x-42

We move all terms to the left:

3(x-4)-(9x-42)=0

We multiply parentheses

3x-(9x-42)-12=0

We get rid of parentheses

3x-9x+42-12=0

We add all the numbers together, and all the variables

-6x+30=0

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

-6x=-30

x=-30/-6

x=+5

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