A cascade of 2 tanks is setup such that that tank 1 initially contains 200 gallons of corn syrup and

... tank 2 initially 100 gallons of water. Suppose that the water flow into tank 1 at a rate of 1 gallon per minute, and that solution in tank 1 flow from tank 1 into tank 2 at a rate also of 1 gallon per minute and the solution in tank 2 also exit tank 2 at the rate of 1 gallon per minute. Find the amount x(t) of corn syrup in tank 1 at the time t less than 0