55 Divided by What Equals 20?
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 55 by to equal 20?
Solving 55 Divided by What Equals 20
Here’s how you would set up this question as an equation:
55
x
=
20
\frac{55}{x} = 20
x 55 = 20
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 55:
55
=
20
∗
x
55 = 20*x
55 = 20 ∗ x
Then we can isolate x on the right side of the equation by dividing both sides by 20:
55
20
=
x
\frac{55}{20} = x
20 55 = 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
=
2.750
x = 2.750
x = 2.750
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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77 divided by what equals 56?
What is 5/9 divided by 65?
What is 13/8 divided by 11/6?
What is 9 divided by 2/3?