What Divided by 3 Equals 40?
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, when divided by 3, equals 40?
Solving What Divided by 3 Equals 40
Here’s how you would set up this question as an equation:
x
3
=
40
\frac{x}{3} = 40
3 x = 40
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, we can do that by multiplying both sides of the equation by 3, resulting in this equation:
x
=
40
∗
3
x = 40*3
x = 40 ∗ 3
Then we simplify and find our answer:
x
=
120
x = 120
x = 120
So, the answer to the question “What divided by 3 equals 40?” is 120.To prove this, we can take the original problem:
x
3
=
40
\frac{x}{3} = 40
3 x = 40
And insert 120 in the place of x:
120
3
=
40
\frac{120}{3} = 40
3 120 = 40
Because this is true, the answer must be correct.
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 72 equals 87?
13 divided by what equals 37?
What is 2/4 divided by 2?
What is 9/15 divided by 5/8?
What is 12 divided by 12/20?