31 Divided by What Equals 90?

Accepted Solution

31 Divided by What Equals 90? 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 90? Solving 31 Divided by What Equals 90 Here’s how you would set up this question as an equation: 31 x = 90 \frac{31}{x} = 90 x 31 ​ = 90 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 = 90 ∗ x 31 = 90*x 31 = 90 ∗ x Then we can isolate x on the right side of the equation by dividing both sides by 90: 31 90 = x \frac{31}{90} = x 90 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 = 0.344 x = 0.344 x = 0.344 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 23 equals 28? 57 divided by what equals 1? What is 8/17 divided by 14? What is 18/16 divided by 15/12? What is 3 divided by 7/11?