One canteen bought 73 kg of pork and mutton.
12 of the pork and
25 of the mutton were sold. The amount of mutton sold was 4 kg more than the amount of pork sold.
- How much mutton did the canteen buy?
- How much pork did the canteen buy?
|
Pork |
Mutton |
Total |
Before |
2x2 = 4 u |
5 u |
+ 10 |
73 |
Change |
- 1x2 = - 2 u |
- 2 u |
- 4 |
|
After |
1x2 = 2 u |
3 u |
+ 6 |
|
(a)
4 ÷ 2 x 5 = 10
4 ÷ 2 x 3 = 6
Total mass of pork and mutton bought
= 4 u + 5 u + 10
= 9 u + 10
9 u + 10 = 73
9 u = 73 - 10
9 u = 63
1 u = 63 ÷ 9 = 7
Mass of mutton bought
= 5 u + 10
= 5 x 7 + 10
= 35 + 10
= 45 kg
(b)
Mass of pork bought
= 4 u
= 4 x 7
= 28 kg
Answer(s): (a) 45 kg; (b) 28 kg