Ben and Jemys sols 3 times moro ice cream cones than shakes

Ben and Jemy\'s sols 3 times moro ice cream cones ) than shakes($9)lflast more\'s sales totaled $1,800, how many of each were sold? Number of cones Number of shakes 163

Solution

Let X = Ice creams and Y = Number of shakes

Now sales equation = 2X + 9Y = 1800

As given in the question proportion of sales is 3:1. It means X = 3 times of Y

2(3Y) + 9 Y = 1800

15Y = 1800

Y = 120

Substitute in the sales equation ......  2X + 9Y = 1800

2X + 9 (120) = 1800

2X = 1800 - 1080 = 720

X = 720 / 2 = 360

Number of Cones = 360

Number of shakes = 120