Hello! :)
Answer:
![\boxed{21}](https://img.qammunity.org/2020/formulas/mathematics/high-school/x4ffa37hi6isgngtn1lk84fjoza5nyei0t.png)
Explanation:
PEMDAS
Parenthesis
Exponent
Multiply
Divide
Add
Subtract
Left/Right
First, you do parenthesis.
2+3-4+(5*4)
5*4=20
2+3-4+20
Then you add/subtract from left/right.
2+3=5
5-4+20
5-4=1
1+20=21
![\boxed{=21}](https://img.qammunity.org/2020/formulas/mathematics/high-school/ku41fbjbhh1vrgvqvvxkd5zu84jtgztzgr.png)
Hope this helps!
Thanks!
Have a nice day! :)
:D
-Charlie