Joelle has y = 18 + 4x (where x is the number of weeks)
Lewis has y = 30 + 3x (where x is the number of weeks)
Joelle currently has 18 rocks in her collection and gains 4 each week. Lewis currently has 30 rocks in his collection and gains 3 each week. Set up a system of equations to show how many rocks each has in their collection
Joelle has y =
Lewis has y =
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