What Divided by 3 Equals 40?
Methods
Setting up the problem:
In a problem like this, the βwhatβ means that weβre working with a variable. The most common variable used in math is βxβ. So, we could say what number, x, when divided by 3, equals 40?
Solving What Divided by 3 Equals 40
Hereβs how you would set up this question as an equation:
x
3
=
40
\frac{x}{3} = 40
3 x β = 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
β
3
x = 40*3
x = 40 β 3
Then we simplify and find our answer:
x
=
120
x = 120
x = 120
So, the answer to the question βWhat divided by 3 equals 40?β is 120.To prove this, we can take the original problem:
x
3
=
40
\frac{x}{3} = 40
3 x β = 40
And insert 120 in the place of x:
120
3
=
40
\frac{120}{3} = 40
3 120 β = 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!
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