CPM Homework Banner

Mary has an antique marble collection containing 40 marbles. She has five more red marbles than blue marbles and twice as many red marbles as green marbles. Write a system of equations to determine the number of each color of marble. Homework Help ✎

Let b = the number of blue marbles, r = the number of red marbles,
and g = the number of green marbles.

b + 5 = r
2g = r
r + g + b = 40

Solve the system of equations using a combination of substitution and elimination.