Answer:
x = 60°, y = 85°, z = 35°
Step-by-step explanation:
(assuming that angles x, y, and z are the interior angles of a triangle)
<u>System of Equations:</u>
x = 60,
y = 2z + 15
x + y + z = 180
<u>Substitute x for 60 and y for (2z + 15) in the third equation.</u>
60 + (2z + 15) + z = 180
75 + 3z = 180
3z = 105
z = 35
<u>Find y by plugging in 35 for z.</u>
y = 2 × (35) + 15
y = 85