Answer:
45
Step-by-step explanation:
X + 1/4x = 15
4/4x + 1/4x = 15
5/4x = 15
5x = 60
x = 12
x=2 because, the question says that the sides are congruent. Therefore if the side away form 5 is one less than it so will x be one less than 3 .
Answer: 44 shirts were a size medium
To find this answer...
We know that 80 T shirts are equal to 100% of the the T shirts
To find 55% of 80, we could cross multiply
80 ?
------ -----
100% 55%
1. We multiple 80 by 55 to get 4,400
2. We divide 4,400 by 100 to get 44
3. 44 is 55% of 80
Hope this helps!