Answer:
solution for x,y,and z.
x+76= 180
x = 180-76
x = 104°
y + x = 180
y + 104 = 180
y = 180 - 104
y = 76°
z + 76 = 180
z = 180 -76
z = 104°
solution for x and y
(3x+5) + ( x+15) = 180
3x + 5 + x + 15 = 180
4x + 20 = 180
4x = 180 -20
4x/4 = 160/4
x = 40
(y+20) + (4y-15) = 180
y + 20 + 4y - 15 = 180
5y + 5 = 180
5y = 180 - 5
5y/5 = 175/5
y = 35
and find the angles measure
for: 3x + 5
= 3(40) + 5
= 120 + 5
= 125°
for: x + 15
= 40 + 15
= 55°
for: y + 20
= 35 + 20
= 55°
for: 4y - 15
= 4(35) - 15
= 140 - 15
= 125 °
