One coffee shop bought 151 kg of venison and mutton.
13 of the venison and
35 of the mutton were sold. The amount of mutton sold was 15 kg more than the amount of venison sold.
- How much mutton did the coffee shop buy?
- How much venison did the coffee shop buy?
|
Venison |
Mutton |
Total |
Before |
3x3 = 9 u |
5 u |
+ 25 |
151 |
Change |
- 1x3 = - 3 u |
- 3 u |
- 15 |
|
After |
2x3 = 6 u |
2 u |
+ 10 |
|
(a)
15 ÷ 3 x 5 = 25
15 ÷ 3 x 2 = 10
Total mass of venison and mutton bought
= 9 u + 5 u + 25
= 14 u + 25
14 u + 25 = 151
14 u = 151 - 25
14 u = 126
1 u = 126 ÷ 14 = 9
Mass of mutton bought
= 5 u + 25
= 5 x 9 + 25
= 45 + 25
= 70 kg
(b)
Mass of venison bought
= 9 u
= 9 x 9
= 81 kg
Answer(s): (a) 70 kg; (b) 81 kg