Question

Maureen cut a 20-cm ribbion into exactly three pieces. The first piece is 3cm shorter than the second piece. The third piece is 4cm shoter than the second. Find the length of the shortest piece.​

Answer 1

The first piece is 6, the second is 9, the third is 5.
9-4=5
9-3=6
9+5+6=20
(You have to guess/try a bunch of numbers to get 9 and see which one works)
Hope this helped!