Question

hola ayuda plissss ayuda​

Answer 1

Problema 3:

x + 20° + x = 90°

2x + 20° =90°

2x = 70°

x = 35°

Problema 4:

40° + 2x + 80° = 180°

2x + 120° = 180°

2x = 60°

x = 30°

Problema 7:

20° + 130° + x = 180°

3x + 150° = 180°

3x = 30°

x = 10°

Problema 8:

2x + 60° = 90°

2x = 30°

x = 15°