At a dairy plant, a milk tank can be filled in 3 hours (using the in-valve). Using the out-valve, the tank can be emptied in 6 hours. If both valves are open and milk is being pumped into the tank, how long will it take to fill the tank?

f(x) = y

f(-3) = -5

step-by-step explanation:

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step-by-step explanation:

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

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step-by-step explanation:

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