Answer: =21
Step-by-step explanation:
This question it's about PEMDAS.
p-parenthesis
e-exponents
m-multiply
d-divide
a-add
s-subtract
left to right.
parenthesis first
5*4=20
2+3-4+20
add and subtract left to right
2+3-4+20
5-4+20
1+20
=21
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