Solve for y so...
3y=-2x+1479
y= -2/3x + 493
then all you do after this is replace y with f(x) so....
f(x)= -2/3x + 493
First find the area of the parallelogram
Area of parallelogram = b x h
= 12 x 7
= 84
Then find area of kite
Area of kite = (xy)/2
= (7 x 12)/2
= 84/2
= 42
Now we are gonna subtract the area of the kite from the area of the parallelogram.
84 - 42 = 42
Therefore the area of the shaded region is 42.
The equation is 48 x 24 x 25 = 28800.