3 Divided by What Equals 30?
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 3 by to equal 30?
Solving 3 Divided by What Equals 30
Here’s how you would set up this question as an equation:
3
x
=
30
\frac{3}{x} = 30
x 3 = 30
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 3:
3
=
30
∗
x
3 = 30*x
3 = 30 ∗ x
Then we can isolate x on the right side of the equation by dividing both sides by 30:
3
30
=
x
\frac{3}{30} = x
30 3 = 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
=
0.100
x = 0.100
x = 0.100
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 49 equals 85?
62 divided by what equals 55?
What is 17/15 divided by 90?
What is 19/7 divided by 20/2?
What is 52 divided by 12/11?