Respuesta :

rosalina5
final answer: x=9

your welcome
cdw2014
The two angles are supplementary which means they add to 180 degrees. To solve for x, set the sum of the expressions equal to 180:

(8x + 5) + (13x - 14) = 180

Combine like terms

21x - 9 = 180

Solve for x

21x = 189

x = 189/21

x = 9