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Home > A2C > Chapter 10 > Lesson 10.2.5 > Problem 10-130


Joanne was making repairs to her deck and needed to buy some supplies. She purchased two posts, three boards, and four piers for . Needing more materials, she went back to the lumberyard and bought one post and five boards for . Realizing she did not need the piers she made a third trip where she bought three more boards, returned the four piers and ended up with a refund of . What was the cost of each item?

Now, solve the system of equations using elimination.

The boards cost , the posts cost , and the piers cost .