Question

Taylor Wilson: Attempt 1

Question 2 (1 point)
Mark and Don are planning to sell each of their marble collections at a garage sale. If
Don has 5 more than 4 times the number of marbles Mark has, how many does Don
have to sell if the total number of marbles is 75?

Answer 1

Don has to sell 61 marbles.

Explanation:

This question is solved by a system of equations.

I am going to say that:

Don has to sell x marbles.

Mark has to sell y marbles.

The total number of marbles is 75:

This means that:

`x + y = 75`

Since we want to find x.

`y = 75 - x`

Don has 5 more than 4 times the number of marbles Mark has

This means that:

`x = 4y + 5`

Since
`y = 75 - x`

`x = 4(75 - x) + 5`

`x = 300 - 4x + 5`

`5x = 305`

`x = (305)/(5)`

`x = 61`

Don has to sell 61 marbles.