Question

A combo meal and a salad cost $12

and 2 combo meals and a salad cost
$20.
How much is a combo meal?
How much is a salad?

Answer 1

Answer: 8$,4$

Explanation:

Answer 2

The cost of a combo meal is $8 and a salad is $4.

Explanation:

You have to form simultaneous equations with the given informations. Let combo meal be m and salad is s :

`m + s = 12 - - - (1)`

`2m + s = 20 - - - (2)`

Next, you have to solve these equations :

`(2) - (1)`

`2m + s - m - s = 20 - 12`

`m = 8`

`sub \: \: m = 8 \: \: into \: \: (1)`

`(1)⇒`

`8 + s = 12`

`s = 4`