30 Divided by What Equals 78?

Accepted Solution

30 Divided by What Equals 78? 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 30 by to equal 78? Solving 30 Divided by What Equals 78 Here’s how you would set up this question as an equation: 30 x = 78 \frac{30}{x} = 78 x 30 ​ = 78 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 30: 30 = 78 ∗ x 30 = 78*x 30 = 78 ∗ x Then we can isolate x on the right side of the equation by dividing both sides by 78: 30 78 = x \frac{30}{78} = x 78 30 ​ = 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 = 0.385 x = 0.385 x = 0.385 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 27 equals 49? 63 divided by what equals 40? What is 9/1 divided by 12? What is 4/7 divided by 3/13? What is 97 divided by 14/16?