Please, help! Thank you

Use the information given in the gure below to construct a mathematical model for the number of pounds of salt x1(t), x2(t), and x3(t) at time t in tanks A, B, and C, respectively. pure water mixture mixture 5 gal/min 4 sol/min 1 gal/min 9): x 4): __ _1+_3__2 dt 100 100 100 dt 100 100 100 X Neednelp? ii Submit