Question

What is the operation here? Subtraction, Multiplication, addition or division.

Answer 1

a = 12

Explanation:

Part A:

a + a + a + a = 84

= a × 4 = 84

∴4a = 84 (Multiplication operation is applied here)

Part B:

4a = 84

a has to be isolated and made the subject of the formula:

`4a = 84`

`a = (84)/(4)`

∴ a = 12