Q:

What Divided by 21 Equals 99?

Accepted Solution

A:
What Divided by 21 Equals 99? 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 99? Solving What Divided by 21 Equals 99 Here’s how you would set up this question as an equation: x 21 = 99 \frac{x}{21} = 99 21 x ​ = 99 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 = 99 ∗ 21 x = 99*21 x = 99 ∗ 21 Then we simplify and find our answer: x = 2079 x = 2079 x = 2079 So, the answer to the question “What divided by 21 equals 99?” is 2079.To prove this, we can take the original problem: x 21 = 99 \frac{x}{21} = 99 21 x ​ = 99 And insert 2079 in the place of x: 2079 21 = 99 \frac{2079}{21} = 99 21 2079 ​ = 99 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! What divided by 69 equals 6? 35 divided by what equals 20? What is 5/16 divided by 44? What is 8/3 divided by 2/4? What is 5 divided by 11/7?