Question 385186
time = distance / rate


280 / x = [280 / (x + 5)] + 1


multiplying by x(x+5), the LCD ___ 280x + 1400 = 280x + x^2 + 5x


0 = x^2 + 5x - 1400


factoring ___ 0 = (x + 40)(x - 35)


x + 40 = 0 ___ x = -40 ___ negative value not realistic


x - 35 = 0 ___ x = 35