Jean had four times the number of toy blocks as Bobby. Jean used all her blocks to build 8 identical cars. Bobby used all his blocks to build 4 identical cars. Jean used 9 more blocks than Bobby for each car. How many blocks did Bobby have?
| |
Jean |
Bobby |
| Number |
8 |
4 |
| Value |
1 u + 9 |
1 u |
| Total value |
8 u + 72 |
4 u |
Number of toy blocks that Bobby used for each car = 1 u
Number of toy blocks that Jean used for each car = 1 u + 9
Number of toy blocks that Bobby had
= 4 x 1 u
= 4 u
Number of toy blocks that Jean had
= 8 x (1 u + 9)
= 8 u + 72
Jean had four times the number of toy blocks as Bobby.
4 x 4 u = 8 u + 72
16 u = 8 u + 72
16 u - 8 u = 72
8 u = 72
1 u = 72 ÷ 8 = 9
Number of blocks that Bobby had
= 4 u
= 4 x 9
= 36
Answer(s): 36
