Respuesta :

(2x + 17) + (4x - 5) = 90

6x + 12 = 90
6x = 90 - 12
6x = 78
x = 13




2(13)+ 17
= 26+ 17
= 43

4(13) - 5
= 52 - 5
= 47

90 + 43 + 47 = 180