Step-by-step explanation:
25)
(x + 96) + (x + 96) = 180° (interior angles)
2x + 192 = 180°
2x = 180° - 192°
2x = - 12°
x = - 12°/2
x = - 6°
Therefore
x + 96 = - 6+96 = 90°
26)
(20x + 5) + (24 x - 1) = 180° (interior angles)
44x + 4 = 180°
44x = 180° - 4°
44x = 176°
x = 176°/44
x = 4°
Therefore
20x + 5 = 20*4+5 = 80+4 =84°
27)
6x = 5x + 10 (corresponding angles)
6x - 5x = 10
x = 10
Therefore
6x = 6* 10 = 60°
28)
(x + 109) + (x + 89) = 180° (interior angles)
2x + 198 = 180°
2x = 180° - 198°
2x = - 18°
x = - 18°/2
x = - 9°
Therefore
x + 89 = - 9+96 = 87°
