Question

Tubes of oil paint are on sale for $.50 cents off. Cody bought 6 tubes if paint on sale and paid a total of $25.80. Write and sole an equation for "r" for the regular price of the oil paint.

Answer 1

25.80=6(r-.50)
25.80 being how much the total was, 6 being the number of tubes of paint, r being the regular price, and .50 being the price off.
28.50=6r-3
31.50=6r
r=5.25
The regular price of the tubes of oil paint is $5.25.