9 Divided by What Equals 45?
Methods
Setting up the problem:
In a problem like this, the “what” means that we’re working with a variable. The most common variable used in math is “x”. So we could say what number, x can we divide 9 by to equal 45?
Solving 9 Divided by What Equals 45
Here’s how you would set up this question as an equation:
9
x
=
45
\frac{9}{x} = 45
x 9 = 45
The goal of the problem is to solve for x. To do this we need to change the equation so that x is alone on one side of the equation.In this case, it can be done in two steps. The first step is to multiply both sides by x to isolate 9:
9
=
45
∗
x
9 = 45*x
9 = 45 ∗ x
Then we can isolate x on the right side of the equation by dividing both sides by 45:
9
45
=
x
\frac{9}{45} = x
45 9 = x
When we simplify the new equation, we can solve for x. In this example, we will round to the nearest three decimal places if that’s needed.
x
=
0.200
x = 0.200
x = 0.200
Practice Other Division Problems Like This One
If this problem was a little difficult or you want to practice your skills on another one, give it a go on any one of these too!
What divided by 85 equals 65?
96 divided by what equals 51?
What is 1/18 divided by 61?
What is 19/10 divided by 15/20?
What is 14 divided by 5/4?