Question

The total cost of a sandwich, a glass of milk, and an apple is $2.35. What was the price of each, if the sandwich cost twice as much as the milk and the apple cost 90 cents less than the sandwich?

Answer 1

The sandwich cost is 1.3$, the glass of milk is 0.65$ and the apple is 0.4$

Explanation:

let the costs be x(sandwich), y(glass of milk) and z(apple) respectively

x=2y

z+0.90=x=2y

then z=2y–0.90

then x+y+z=2.35$

(2y)+y+(2y–0.90)=2.35$

5y=2.35+0.90

5y=3.25$

y=0.65$

then x=2y=2×0.65=1.3$

then z=2y–0.90=1.3–0.90=0.4$