Answer:

using MDAS ---

9-15+5+(6+4)

6+4=10

15+5=20

20+10=30

9-30= (negative) -21

normal solution ---

9-15+5+(6+4)

6+4=10

9-15=(negative) -6

-6+5= (negative) -1

-1 +10= 9

nope this helps.stay safe

Answer

= 9

Step-by-step explanation:

6+4=10

9-15= -6

-6+5= - 1

10+-1