Question

me ajudem dou pontos por favir

Answer 1

a)
4x + 5 + x + 15 = 90
5x+20 = 90
5x = 70
x = 70 / 5
x = 14°

b)
3x + 30 + 5x -90 = 180
8x - 60 = 180
8x = 240
x = 240 / 8
x = 30°

c)
x - 100 + x + 10 = 180
2x -90 = 180
2x = 270
x = 270 / 2
x = 135°

d)
5x + 30 + x = 180
6x = 150
x = 150 / 6
x = 25°