10+2(7-3+4)-15/3=

Question

I'm using order of operation, the answer according the book is 21 however I'm not doing something right.

Answer 1

10+2(7-3+4)-15/3

 

(P)EMDAS

 

10+2(8)-15/3

 

PE(M)DAS

 

10 + 16 – 15/3

 

PEM(D)AS

 

10 + 16 – 5

 

PEMD(A)S

 

26 – 5

 

PEMDA(S)

 

21