Cezar ised nails, screws, and pegs to build a model house. He used twice as many as pegs and 3 fewer nails than screws. He used 15 nails. How many pegs did he use?

Answer 1

number of screws ---- x
number of pegs ---- 2x
number of nails ---- x-3

x-3=15 ---> x=18
so he used 36 pegs