31 Divided by What Equals 21?

Accepted Solution

31 Divided by What Equals 21? 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 31 by to equal 21? Solving 31 Divided by What Equals 21 Here’s how you would set up this question as an equation: 31 x = 21 \frac{31}{x} = 21 x 31 ​ = 21 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 31: 31 = 21 ∗ x 31 = 21*x 31 = 21 ∗ x Then we can isolate x on the right side of the equation by dividing both sides by 21: 31 21 = x \frac{31}{21} = x 21 31 ​ = 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 = 1.476 x = 1.476 x = 1.476 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 96 equals 37? 78 divided by what equals 56? What is 16/10 divided by 21? What is 1/7 divided by 6/13? What is 23 divided by 5/3?