Question

In order to solve the equation, what must you do?

3x=9

divide by 3 on both sides of the equation
multiply by 3 on both sides of the equation
Divide by 9 on both sides of the equation
multiply by 9 on both sides of the equation
add 3 to both sides of the equation
subtract 3 to both sides of the equation​

Answer 1

divide by 3 on both sides of the equation

Explanation:

3x = 9

The variable x is being multiplied by 3. You want x alone, so you must use the opposite operation of multiplication to undo the multiplication by 3. The opposite of multiplication is is division. Since x is being multiplied by 3, you must divide by 3. The rule of equations is that you must do the same operation to both sides of the equation, so you must divide both sides of the equation by 3.

Answer 2

You must divide by 3.

Explanation:

3x / 3 = x

9 / 3 = 3

Hence x = 3