Use the substitution method to solve the system of equations

The graph shows the rate at which paint is used to paint a wall. enter values to complete each statement below based on the graph. when 1 gallon of paint has been used, ( # ) square feet of the wall will be painted. the unit rate is ( # )square feet per gallon.

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76