Alexandra finds that she can give 3 haircuts and 2 hair dyes in 315 minutes. Giving 2

haircuts and 4 hair dyes takes 450 minutes. How long does it take her to do a haircut?

3x + 2y = 315

2x + 4y = 450

60 minutes

3x + 4y = 450

90 minutes

2x + 4y = 315

45 minutes

30 minutes