Question

in my money box i have only $1 and $2 coins. i have 240 coins in total, worth $318. how many $2 coins do i have in my money box?

Answer 1

There are 78 $2 coins in the money box

Explanation:

let x = number of $1 coins

Let y = number of $2 coins

x + y = 240 solve for x: x = 240 - y

x + 2y = 318 Substitute 240 - y for x in the this equation

240 - y + 2y = 318 Combine like terms

240 + y =318 Subtract 240 from both sides

y = 78

Helping in the name of Jesus.