Question

Alvin had 30 beads more than Bobby Cathy had thrice as many beads as

Alvin. They had a total of 345 beads. How many beads did Bobby have?

Answer 1

Alvin: 1U
Bobby: 1U + 30
Cathy: 3U
345-30= 315
315/5{units)= 63
63+30= 93
Bobby had 93 beads

Answer 2

Bobby has 45 beads

Explanation:

Let x be the number of beads Bobby has.

Then, (x + 30) is the number of beads Alvin has.

Then, 3 (x + 30) is the number of beads Cathy has.

3 (x + 30) + (x + 30) + x = 345

3x + 90 + x + 30 + x = 345

5x + 120 = 345

5x = 225

x = 45

Therefore, Bobby has 45 beads.