Mrs Julian baked
12 as many cranberry shortbreads as cheese shortbreads. She also baked
27 as many cranberry shortbreads as strawberry shortbreads. If she baked a total of 78 shortbreads, how many cranberry shortbreads did she bake?
Cranberry |
Cheese |
Strawberry |
1x2 |
2x2 |
|
2x1 |
|
7x1 |
2 u |
4 u |
7 u |
The number of cranberry shortbreads is the repeated identity. Make the number of cranberry shortbreads the same. LCM of 1 and 2 is 2.
Total number of shortbreads
= 2 u + 4 u + 7 u
= 13 u
13 u = 78
1 u = 78 ÷ 13 = 6
Number of cranberry shortbreads
= 2 u
= 2 x 6
= 12
Answer(s): 12