One canteen bought 132 kg of beef and chicken.
13 of the beef and
35 of the chicken were sold. The amount of chicken sold was 12 kg more than the amount of beef sold.
- How much chicken did the canteen buy?
- How much beef did the canteen buy?
|
Beef |
Chicken |
Total |
Before |
3x3 = 9 u |
5 u |
+ 20 |
132 |
Change |
- 1x3 = - 3 u |
- 3 u |
- 12 |
|
After |
2x3 = 6 u |
2 u |
+ 8 |
|
(a)
12 ÷ 3 x 5 = 20
12 ÷ 3 x 2 = 8
Total mass of beef and chicken bought
= 9 u + 5 u + 20
= 14 u + 20
14 u + 20 = 132
14 u = 132 - 20
14 u = 112
1 u = 112 ÷ 14 = 8
Mass of chicken bought
= 5 u + 20
= 5 x 8 + 20
= 40 + 20
= 60 kg
(b)
Mass of beef bought
= 9 u
= 9 x 8
= 72 kg
Answer(s): (a) 60 kg; (b) 72 kg