What Divided by 21 Equals 2?
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 21, equals 2?
Solving What Divided by 21 Equals 2
Here’s how you would set up this question as an equation:
x
21
=
2
\frac{x}{21} = 2
21 x = 2
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 21, resulting in this equation:
x
=
2
∗
21
x = 2*21
x = 2 ∗ 21
Then we simplify and find our answer:
x
=
42
x = 42
x = 42
So, the answer to the question “What divided by 21 equals 2?” is 42.To prove this, we can take the original problem:
x
21
=
2
\frac{x}{21} = 2
21 x = 2
And insert 42 in the place of x:
42
21
=
2
\frac{42}{21} = 2
21 42 = 2
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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