Two feeds, 10 mole with 5 J/mole and 20 mole with 15 J/mole, product contains two streams, 5 mole with 10 J/mole and P with 25 J/mole, what is the value of P?

Correct Answer: 12 mole
10*5 + 20*15 = 5*10 + P*25, => P = 12 mole.