A jacket cost $20 more than a cardigan. Anna paid $379 for 5 jackets and 4 cardigans. How much did 1 jacket cost?
| |
Cardigans |
Jackets |
Total |
| Number |
4 |
5 |
|
| Value |
1 u |
1 u + 20 |
|
| Total value |
4 u |
5 u + 100 |
9 u + 100 |
Cost of 1 cardigan = 1 u
Cost of 4 cardigans = 4 u
Cost of 1 jacket = 1 u + 20
Cost of 5 jackets
= 5 x (1 u + 20)
= 5 u + 100
Cost of 4 cardigans and 5 jackets
= 4 u + 5 u + 100
= 9 u + 100
9 u + 100 = 379
9 u = 379 - 100
9 u = 279
1 u = 279 ÷ 9 = 31
Cost of 1 jacket
= 31 + 20
= $51
Answer(s): $51
