#A = color(blue)((3/4))* (p) (a+x) #
#A * color(blue)((4/3)) = color(green)((p)) (a+x) #
#4/3 A = color(green)((p)) * (a) + color(green)((p)) * (x) #
#(4A)/3 = pa + px #
#(4 A)/3 = color(purple) (p) * ( a+ x) #
#(4A )/(3 * color(purple)(p)) = a+ x #
#(4A )/(3p) = a+ x #
#(4A )/(3p) - a = x #