Question

4 × (2a − 1) if a = 3?

Answer 1

20

Explanation:

4 × (2a − 1)

Put a as 3.

4 × (2(3) - 1)

Evaluate.

4 × (6 - 1)

4(5)

= 20

Answer 2

20

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)

20