Question

the compound used to grow orchids is made from 3 kilograms of moss for every 5 kilograms of pine bark. if 12 kilograms of the compound are to be prepared, how many kilograms of pine bark are needed?

Answer 1

3x + 5x = 12

8x = 12, so x = 2/3

5(2/3) = 10/3 = 3 1/3 kg pine bark