Answer:
20
Step-by-step explanation:
4 × (2a − 1)
Let a = 3
4 × (2*3 − 1)
Parentheses first
Multiply inside
4 × (6 − 1)
Then subtract inside the parentheses
4 × (5)
Put a as 3.
4 × (2(3) - 1)
Evaluate.
4 × (6 - 1)
4(5)
= 20
