Question

Mark and Don are planning to sell each of their marble collections at a garage sale. If Don has 3

more than 4
times the number of marbles Mark has, how many does each boy have to sell if the total number of marbles is 108?

Answer 1

M = 21

D = 87

Explanation:

D = Don

M = Mark

D = 3+ 4M

M +D = 108

M +(3 + 4M) = 108

3+4M = 108

105 = 5M

M = 21

Then we substitute:

D = 3 + 4M

D = 3 + 4(21)

D = 3 + 84

D = 87

Answer:

Don has 87, and Mark has 21.

Thanks!