Question

Candy A sells for $2.50/kg. Candy B sells for $5.00/kg. What quantities of each kind of candy should be used to make up a 100 kg mixture to sell for $4.00/kg?

Answer 1

I found:
`A=40kg`
`B=60kg`

Explanation:

Call `A` and `B` the quantities (in kg) of the two kind of candy:
For a `100kg` mixture:
`{(A+B=100), (2.5A+5B=400):}`
And you get:
`A=40kg`
`B=60kg`