You need to find x, I'm having trouble though

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 private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.

Graph the equationy= x+3[tex]y = x + 3[/tex]