Kara spends $16 on paint and brushes. Paint costs $3 and brushes cost $.50. Kara buys twice as many brushes as paint.Find the number of brushes and the number o

Question

Using a linear system using substitution

 

 

 

 

Answer 1

Let x = number of brushes, and

y = number of paints

 

Kara buys twice as many brushes as paint

x = 2y 

 

then we can write the total cost equation as

 

3y + 2y*(0.5) = 16

The first part of the above equation represents the cost of paints and the second term represents the cost of brushes

 

3y + y =16

4y =6

y = 4 number of paints

2*4 = 8 number of brushes