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If don has three more than three times the number of marbles mark how many does each boy have to sell if the total number of marbles is 99 

User Evan Emolo
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1 Answer

3 votes

Answer:

Don has 75 marbles to sell, Mark has 24 marbles to sell

Explanation:

Don has three more than three times the number of marbles Mark has

Now this information can be put into equation form

(In this equation, D = Don and M = Mark)

Equation:

D = 3M + 3

The total number of marbles is 99

This represented as an equation is:

D + M = 99

Now, with both of these equations, it is now a system of equations. Now you must solve the system of equations.

Substitute the value of D from the first equation into the second equation

(3M + 3) + M = 99

4M + 3 = 99

4M = 99 - 3

4M = 96

M = 96/4

M = 24

Now you can substitute the value of M back into the first equation to find the value of D

D = 3(24) + 3

D = 72 + 3

D = 75

This shows that Don has 75 marbles to sell, and Mark has 24.

User Rmtheis
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