Kimberly had five times the number of rubber blocks as Justin. Kimberly used all her blocks to build 12 identical cars. Justin used all his blocks to build 6 identical cars. Kimberly used 9 more blocks than Justin for each car. How many blocks did Justin have?
| |
Kimberly |
Justin |
| Number |
12 |
6 |
| Value |
1 u + 9 |
1 u |
| Total value |
12 u + 108 |
6 u |
Number of rubber blocks that Justin used for each car = 1 u
Number of rubber blocks that Kimberly used for each car = 1 u + 9
Number of rubber blocks that Justin had
= 6 x 1 u
= 6 u
Number of rubber blocks that Kimberly had
= 12 x (1 u + 9)
= 12 u + 108
Kimberly had five times the number of rubber blocks as Justin.
5 x 6 u = 12 u + 108
30 u = 12 u + 108
30 u - 12 u = 108
18 u = 108
1 u = 108 ÷ 18 = 6
Number of blocks that Justin had
= 6 u
= 6 x 6
= 36
Answer(s): 36
