how many of each color were sold ?

Question

one day a store sold 36 sweatshirts. White ones cost $9.95 and yellow ones cost $13.50 . In all $422.10 worth of sweatshirts were sold . how many of each color were sold ?

Answer 1

X = The number of white t shirts sold

36 - X = The number of yellow ones sold

9.95X + 13.50(36 - X) = 422.10

63.90 = 3.55X

X = 18

White t-shirts sold = 18

Yellow t-shirts sold = 36-18 = 18