Olivia spent
34 of her money on some biscuits and
37 of her remaining money on 7 cookies. Each cookie cost thrice as much as a biscuit. How many biscuits did she buy?
Biscuits |
Remaining money |
3x7 |
1x7 |
|
7 Cookies |
Left |
|
3x1 |
4x1 |
21 u |
3 u |
4 u |
Cost of 1 cookie = Cost of 3 biscuits
(x7)Cost of 7 cookies = Cost of 21 biscuits
3 u = 21
1 u = 21 ÷ 3 = 7
Number of biscuits that Olivia bought
= 21 u
= 21 x 7
= 147
Answer(s): 147