Question 130521
let x="original number" __ 360/x=(360/(x-3))-20


multiplying by x(x-3) __ 360x-1080=360x-20x^2+60x


subtracting 360x-1080 and dividing by -20 __ 0=x^2-3x-54


factoring __ 0=(x-9)(x+6) __ 0=x-9 and 0=x+6