One eating house bought 323 kg of beef and pork.
15 of the beef and
57 of the pork were sold. The amount of pork sold was 25 kg more than the amount of beef sold.
- How much pork did the eating house buy?
- How much beef did the eating house buy?
|
Beef |
Pork |
Total |
Before |
5x5 = 25 u |
7 u |
+ 35 |
323 |
Change |
- 1x5 = - 5 u |
- 5 u |
- 25 |
|
After |
4x5 = 20 u |
2 u |
+ 10 |
|
(a)
25 ÷ 5 x 7 = 35
25 ÷ 5 x 2 = 10
Total mass of beef and pork bought
= 25 u + 7 u + 35
= 32 u + 35
32 u + 35 = 323
32 u = 323 - 35
32 u = 288
1 u = 288 ÷ 32 = 9
Mass of pork bought
= 7 u + 35
= 7 x 9 + 35
= 63 + 35
= 98 kg
(b)
Mass of beef bought
= 25 u
= 25 x 9
= 225 kg
Answer(s): (a) 98 kg; (b) 225 kg