how do I place this on equation and solve?

Question

The number of calories in a mint is 3 times the number of calories in stick of gum. There 70 calories in 5 stick of gum and 3 mints. How many calories are there in each stick of gum? Mint?

Answer 1

let M be the amount of calories in a mint and G be the number of calories in Gum

 

M = 3G

 

5G + 3M  = 70

 

so substituting M = 3G into the second equation we have

 

14M = 70

 

M = 5

 

and G = 5 / 3

 

5 calories in mint and 1.666 calories in Gum