Don’t be fooled

Question

A ball and glove together cost $10. if the glove cost $9 more than the ball, what is the cost of the ball?

Answer 1

B + G = 10

G= 9 + B

B+ 9 + B = 10

2B = 10-9 = 1

B = 1/2

G= 10 - 1/2 = 9 1/2