Respuesta :

ghanami

Answer:

- 17

Step-by-step explanation:

hello :

5x  + 25(34-x)= 510

divid by 5 :   x +5(34-x)=102

x+ 170 -5x = 102

-4x =102-170

-4x = 68

x = 68/- 4 = - 17