Question

cunato sale en 6-4•9+30=6-a

Answer 1

6-36+30-6=-a
-6=-a
a=6

Answer 2

6-4.(9) +30= 6-a

6-36 +30 = 6-a

-36+36 = 6-a

0 = 6-a

-6 = -a

-6/-1 = a

6 = a

a = 6