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 =

1 answer

Joelle has y = 18 + 4x (where x is the number of weeks)
Lewis has y = 30 + 3x (where x is the number of weeks)