One coffee shop bought 244 kg of chicken and beef.
13 of the chicken and
47 of the beef were sold. The amount of beef sold was 20 kg more than the amount of chicken sold.
- How much beef did the coffee shop buy?
- How much chicken did the coffee shop buy?
|
Chicken |
Beef |
Total |
Before |
3x4 = 12 u |
7 u |
+ 35 |
244 |
Change |
- 1x4 = - 4 u |
- 4 u |
- 20 |
|
After |
2x4 = 8 u |
3 u |
+ 15 |
|
(a)
20 ÷ 4 x 7 = 35
20 ÷ 4 x 3 = 15
Total mass of chicken and beef bought
= 12 u + 7 u + 35
= 19 u + 35
19 u + 35 = 244
19 u = 244 - 35
19 u = 209
1 u = 209 ÷ 19 = 11
Mass of beef bought
= 7 u + 35
= 7 x 11 + 35
= 77 + 35
= 112 kg
(b)
Mass of chicken bought
= 12 u
= 12 x 11
= 132 kg
Answer(s): (a) 112 kg; (b) 132 kg