How can we do this math problem?

b) 92

Step-by-step explanation:

1. if according to the condition the triangle is equilateral, then every inside angle (m∠F=m∠G=m∠H) is 60°.

2. it is possible to substitute the value 60 (F=60) into the given equation:

3. if to solve the equation above, then Z=92

x = 12

y = 1

for the points!