Answer:
21
Step-by-step explanation:
PEDMAS
P - parentheses
E - exponent
D - division
M - multiplication
A - addition
S - subtraction
2 + 3 - 4 + (5 x 4)
P - parentheses.
(5 × 4) = 5 × 4 = 20
2 + 3 - 4 + 20
A - Addition and S - subtraction (left to right)
2 + 3 = 5
5 - 4 + 20
5 - 4 = 1
1 + 20 = 21
