Answer:
The number of cheery pieces in the box are
.
Explanation:
Let the number of orange pieces in the box be
.
The box contains three times as many cherry pieces as orange pieces.
So, the number of cherry pieces in the box be
.
It has four more grape pieces than cherry pieces.
So, the number of grape pieces in the box be
.
There are
total pieces in the box.
So,






So, the number of cherry pieces
.
Hence, the number of cheery pieces in the box are
.