Respuesta :
Answer:
y = 10
Step-by-step explanation:
By definition, the internal angles of an equilateral triangle are all 60. So:
A = 5y + 10 = 60
5y + 10 = 60
5y + 10 - 10 = 60 - 10
5y = 50
5y/5 = 50/5
y = 10
Answer:
10
Step-by-step explanation:
Verified correct with test results.