Question

fill in the blanks [13+(-9)]+_=13+[(-9)+(-5)]

Answer 1

-5....................

Answer 2

let the blank will fill with x

[13-9+x=13+[-14]

4+x=13-14

x=-1-4

x=-5

then the blank will filled with -5

verification

13-9-5=13-9-5

4-5=4-5

-1=-1

i hope this will help you