6th Grade Itinerary Problems Using Formulas: Problem 2

Problem: Randy is taking the escalator from the subway station to the surface of the ground. If the escalator moves up one step every second, it takes Randy 20 steps to walk in order to get to the ground level. If the escalator moves up two steps every second, it takes Randy to walk 30 steps in order to get to the ground level. There are _____ steps of the escalator visible at once.

Key: Use formulas and create equations out of problem

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