Respuesta :

Answer:

-12 and -5

Step-by-step explanation:

a+b=-17

b-a=7

b=7+a

a+7+a=-17

2a+7=-17

2a=-17-7

2a=-24

a=-12

-12+b=-17

b=-17+12

b=-5

so a and b are -12 and -5 respectively