Question

Marie and Tony went shopping together. Marie bought 2L of milk and 10 oranges for $3.44. Tony bought 3L of milk and 8 oranges for $3.69. What was the cost of one liter of milk? Of ine orange?

Answer 1

let us say that the cost of 1L of milk is x and cost of 1 orange is y.
Then
2x+10y=3.44
3x+8y=3.69
2(x+5y)=2*1.72
x+5y=1.72
x=1.72-5y
Substituting this in 3x+8y=3.69
3(1.72-5y)+8y=3.69
3*1.72-3*5y+8y=3.69
5.16-15y+8y=3.69
Find y from this and then plug in that value of y in
x=1.72-5y to find x.
Does that help?

Answer 2

Yes wait i'll try it

Answer 3

ha k:)