Answer:
14. x=30, y=15, z=165
15. x=10, y=25
Step-by-step explanation:
1)
x= 30
y=15
z=150
2)
x= 10
y=25
2x+90+x=180
3x+90=180
x= 90/3=30
2y= x
2y=30
y= 30/2=15
2y+z= 180
30+z= 180
z= 150
3x= 5x-20
5x-3x=20
x=20/2=10
2y+4y+ (5x-20) = 180
6y+30= 180
y= 150/6= 25
I hope im right!!
