Question

A red candle is 8 inches tall and burns at a rate of 7/10 inch per hour. A blue candle is 6 inches tall and burns at a rate of 1/5 inch per hour. After how many hours will both candles be the same height? Enter your answer in the box.

Answer 1

$8 - (\frac{7}{10} \times x )= 6 - ( \frac{1}{5} \times x)$
(X is hour)
so, x=4 ; Answer is 4(hour).