need help so I may assist my daughter with her homework

Hi Lisa, in order to solve this equation you will need to focus on isolating "x" to one side of the equation and then proceed to solving for "x" as follows:

1. Expand left side of equation...

3(x-4)--> 3x-12

...you now have 3x-12=18x

2. Isolate x to right side by subtracting 3x from both sides...

3x-3x-12=18x-3x --> -12 = 15x

3. Solve for x by dividing both sides by 15...

-12/15 = x