Question

Solve the equation 5x = 45

7

9

5

3

Answer 1

Solving the equation is finding out what x is equal to.
x is being multiplied by 5. You want x by itself.
In order to undo the multiplication by 5, you need to divide by 5.
The rule is that you must divide both sides of an equation by the same number.

\(5x = 45\)

We divide both sides by 5:

\(\dfrac{5x}{5} = \dfrac{45}{5} \)

\(x = 9 \)