Question

Solve by using the elimination method.

Sally spent $14.85 to buy 13 flowers. She bought lilies, which cost $1.25 each, and tulips, which cost $0.90 each. How many of each flower did Sally buy?
CAN SOMEONE HELP ME WITH THIS ONE PLEASE!!!!!!!

Answer 1

a = lilies

13 - a = tulips

We have: 1.25a + 0.90(13 - a) = 14.85

=> 1.25a + 11.7 -0.90a = 14.85

=> 0.35a = 14.85 - 11.7 = 3.15

=> a = 3.15 ÷ 0.35 = 9

=> She bought 9 lilies and 4 tulips