Answer:
15 strawberry arrangements, 5 pineapple arrangements
Explanation:
First, you come up with an equation based on the problem:
3x+x=20
Then you simplify:
4x=20
Now you divide 20 by 4 to get the answer 5 FOR X
Still you have to find out the strawberry arrangements
Since it is three times, multiply 5 and 3 to get 15
5 strawberry arrangements, 5 pineapple arrangements