Bamboo grows about 4 cm per hour during the vigorous growth period. Tremella fuciformis grows faster, increasing by about 25 cm per hour during the vigorous growth period.

If they are all in the vigorous growth period, the initial height of bamboo is 32 cm, and the initial height of fungus is 0.5 cm. When can tremella catch up with the height of bamboo? Say the equivalence relation first, and then solve it with equations. This math problem (to be solved)