Respuesta :
Answer:
The answer is A.
Step-by-step explanation:
Basically as it says, the first length is 5 more than the second and the third is 7 more than the first.
Answer:
A. 21, 16, 28
Step-by-step explanation:
1st side = x
2nd side = x-5
3rd side = x+7
x+x-5+x+7 = 65
3x + 7 - 5 = 65
3x + 2 = 65
3x = 65-2
3x = 63
63/3 = 21
x = 21
therefore, the sides are 21, 16, and 28