tolong dong jawab, itu udh ada jawabannya tapi guru aku nyuruh pke jln ,tolongg bnget plissss

2a. 2x+10=70°
2x=70-10=60°
x=60:2=30°

2b.4x+40=120°
4x=120-40=80°
x=80:4=20°

3a.3x+60=120°
3x=120-60=60°
x=60:3=20°

3b.3x+15=75°
3x=75-15=60°
x=60:3=20°

4a.5x°=40°
x=40:5=8°

4b.7x+25=130°
7x=130-25=105°
x=105:7=15°