7.ALG.4: Write an equation to express two quantities in terms of the dependent and independent variables.

Write an equation to express two quantities in terms of the dependent and independent variables.

Example Problems
A freight train carries c containers weighing w tons each and k pallets weighing q tons each, for a total load of L tons.
Write an equation that relates c, w, k, q, and L.
A restaurant sells g gourmet burgers at s dollars each and p plates of pasta at t dollars each, earning L dollars in lunch revenue.
Write an equation that relates g, s, p, t, and L.
A swimming pool is filled at a rate of r liters per minute for t minutes, after which q liters evaporate. The net gain in water is 3000 liters.
Write an equation that relates r, t, and q.
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