Bantu jawab dongg yang mana aja deh ​

Nomor 2

6x – 2° + 5x + 11° + 7x + 9° = 90°

18x = 90° + 2° – 11° – 9°

18x = 72°

x = 72°/18

x = 4°

Nomor 3

x + 3 /x =54 + 18 / 54

x + 3 / x = 72/54

54(x + 3) = 72x

54x + 162= 72x

162 = 72x – 54x

162 = 18x

162/18 =

9 cm = x

Nomor 4

3x + 7x + 80° = 180°

10x = 180° – 80°

x = 100°/10

x = 10°