Hey so.. I need help on another question plz help.

cost of 1 brush = $ 5.25

cost of 1 tube of paint = $ 3.5

Step-by-step explanation:

here's the solution,

let the cost of a brush be x

and the cost of each tube of paint = y

now,

from above statement we get,

=》4x + 2y = 28

=》6x + 8y = 59.50

multiplying equation 1 with 4

=》4 × (4x + 2y) = 28

=》16x + 8y = 112

now, subtracting equation 2 from the newly derived equation 1

=》16x + 8y - 6x - 8y = 112 - 59.50

=》10x = 52.50

=》x = 52.50 ÷ 10

=》x = 5.25

now,

plugging the value of x in equation 1,

=》4x + 2y = 28

=》(4 × 5.25) + 2y = 28

=》21 + 2y = 28

=》2y = 28 - 21

=》y = 7 ÷ 2

=》y = 3.5

y=3.5

..

ratio is 2 : 9

the answer is three

13.5 : 3