Miss Smith spent 16 on tubes of paint and disposable brushes

Miss Smith spent $16 on tubes of paint and disposable brushes to paint a window in her classroom. Each tube of paint costs $3 and each brush costs .50. Miss Smith purchases twice as many brushes as tubes of paint. Find the number of brushes and the number of tubes of paint that she purchases.

Solution

Miss Smith spent $16 on tubes of paint and disposable brushes

Each tube of paint costs $3

Each brush costs $0.50

Assuming no. of brushes be B and no, of tubes of paint be P

purchases twice as many brushes as tubes of paint. B = 2P

So, B*0.50 + P*3 = 16

2P*0.5 +3P = 16

4P = 16

P = 4 (no. of tubes of paint)

B = 2P = 8 ( no. of brushes