MATH SOLVE

4 months ago

Q:
# 81 Divided by What Equals 8?

Accepted Solution

A:

81 Divided by What Equals 8?
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 81 by to equal 8?
Solving 81 Divided by What Equals 8
Here’s how you would set up this question as an equation:
81
x
=
8
\frac{81}{x} = 8
x 81 = 8
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 81:
81
=
8
∗
x
81 = 8*x
81 = 8 ∗ x
Then we can isolate x on the right side of the equation by dividing both sides by 8:
81
8
=
x
\frac{81}{8} = x
8 81 = 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
=
10.125
x = 10.125
x = 10.125
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 79 equals 94?
68 divided by what equals 48?
What is 10/15 divided by 82?
What is 13/12 divided by 9/20?
What is 47 divided by 11/16?