Plug in the numbers that you have to find to this. The first one, the equation is
h^ = 6x4
The second equation you have to find x before you find h.
Do 6^ = x • 12
And then when you get the answer for x do the equation
h^ = (x) • (y)
You will know what the x is after solving the equation, then do 12 - x to find the y