Respuesta :

choixongdong
x + 2x +4 + 2x - 9 = 180
5x - 5 = 180
5x = 185
  x = 37

answer
c. x = 37
1.

Given any triangle with angle measures a, b and c, 

the sum of a, b and c is always 180°, 

2.

The measures of the angles are (2x+4)°, (2x-9)° and x°,

then

(2x+4)° + (2x-9)° + x°= 180°

2x+4+2x-9+x=180

5x-5=180

5x=185

x=185/5=37