Help Please I Really Need Help

Find the x coordinate of the point.

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)