Sagot :
Answer:
y=10°
Step-by-step explanation:
Here,
→(3x+18)°=(5x-4)°
→18°+4°=5x-3x
→22°=2x
→x=11°
Also,
3(4y+3)°+5x-4°=180°[The sum of the linear pair is 180°]
12y+9°+5x-4°=180°
12y+5°+5×11°=180°
12y+5°+55°=180°
12y=180°-60°
12y=120°
y=120°/12
y=10°
Opposite angles are equal
- 3x+18=5x-4
- 22=2x
- x=11
Now
linear pairs are supplementary
- 3x+18+3(4y+3)=180
- 3(11)+18+12y+9=180
- 33+18+12y+9=180
- 12y+60=180
- 12y=120
- y=10