How many square feet of each tile should he plan to use if he wants the overall cost to be $4.72 per square foot?

Question

Sergio wants to tile the floor of his house. He will need  square feet of tile. He will do most of the floor with a tile that costs  per square foot, but also wants to use an accent tile that costs  per square foot. How many square feet of each tile should he plan to use if he wants the overall cost to be  per square foot? 

Answer 1

Let x = sq ft of inexpensive. tile used.

Let y = sq ft of expensive (accent) tile used.

The equations are x + y = 755

and 3.20 x + 10.15 y = 4.72(755)

Are you able to now solve for x and y?

Answer 2

x represents the amount of the main tile

755 represents the amount of the trim tile

3.20x + 10.15(755 - x) = 4.72(755)

Can you solve for x and answer?