Question

One day a store sold 17 sweatshirts. white ones cost​ $10.95 and yellow ones cost $ 11.50. in​ all, ​$192.75 worth of sweatshirts were sold. how many of each color were​ sold?

Answer 1

Let x be the number of white sweats
Let y be the number of yellow sweats

$192.75 = $10.95x+ $11.50y
X+y=17

X= 17-y

192.75 = 10.95 (17-y) + $11.50y

192.75 = 186.15 -10.95y +11.50y

192.75-186.15 = 0.55y

6.6/0.55 = y

12= y

X+y = 17

X+ 12 = 17

X= 5

(5, 12)