Question

Charles has 9 times as many red marbles as blue marbles.

If he has 288 more red than blue marbles, how many red marbles does
he have?

Answer 1

• 314 red marbles

Explanation:

Red = r, blue = b,

• r = 9b
• r = b + 288

Substitute:

• 9b = b + 288
• 8b = 288
• b = 288/8
• b = 26

Red marbles:

• r = 288 + 26 = 314