Question

I just need help understand where I get the 7 for the dx/dt

1. (5 points) Two large tanks, each holding 100 L of liquid, are interconnected by pipes, with the liquid flowing from Tank A into Tank B at a rate of 3 L/min and from B into A at a rate of 1 L/min. The liquid inside each tank is kept well stirred. A brine solution with a concentration of 0.2 kg/L of salt flows into Tank A at a rate of 6 L/min. The (diluted) solution flows out of the system from Tank A at 4 L/min and from Tank B at 2 L/min. Also, initially, Tank A contains pure water and Tank B contains 20 kg of salt. Formulate a system of differential equations AND initial conditions that describes this flow process. You do NOT need to solve the final system. Use(t and y(t) to represent the amount of salt in kg in the tanks A and B, respectively int02 6L/min L/min xit) yu) 00 L y(0)-20 kg 0.2 kg/L 00 L L/minx(0) 0kg 2 L/min L/min 10D

Answer 1

HCE dt กา.crs mai out mas chamge dy

dt Yt substitutingれ the be in GAMatioo

ヒ 2 oO sub χ into epuatigo 3 loo -541 iritial

SANT e Too ут