Question

A school cafeteria sells milk at 25 cents per caron and salads at 45 cents each. One week the total dales for theese items were $132.50. How many salads were sold that week?

Answer 1

let X=caron , Y= salads ,

0.25X + 0.45Y =$132.50
Y=(-0.25X+132.50 )/0.45
Y = -0.55X +294
Subtitutio: x and y depend on you select