Question 122435
4x + 3y = 100 __ subtracting 4x __ 3y=100-4x __ dividing by 3 __ y=(100-4x)/3


A = 2x(y) __ substituting for y __ A=2x(100-4x)/3 __ A=(200x-8x^2)/3


so f(x)=(200x-8x^2)/3