Mrs Wendy bought some sandwiches and muffins at the prices shown.
She bought 9 more muffins than sandwiches and spent $30 altogether. How many sandwiches did she buy?
|
Muffins |
Sandwiches |
Total |
Number |
1 u |
1 u + 9 |
|
Value |
$4 |
$2 |
|
Total value |
4 u |
2 u + 18 |
6 u + 18 |
Amount spent on muffins
= 4 x 1 u
= 4 u
Amount spent on sandwiches
= 2 x (1 u + 9)
= 2 u + 18
Total amount spent on the pastries
= 4 u + 2 u + 18
= 6 u + 18
6 u + 18 = 30
6 u = 30 - 18
6 u = 12
1 u = 12 ÷ 6 = 2
Total number of sandwiches
= 1 u
= 2
Answer(s): 2