What Divided by 51 Equals 31?MethodsSetting 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 51, equals 31?Solving What Divided by 51 Equals 31Here’s how you would set up this question as an equation:x51=31\frac{x}{51} = 3151x=31The 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 51, resulting in this equation:x=31∗51x = 31*51x=31∗51Then we simplify and find our answer:x=1581x = 1581x=1581So, the answer to the question “What divided by 51 equals 31?” is 1581.To prove this, we can take the original problem:x51=31\frac{x}{51} = 3151x=31And insert 1581 in the place of x:158151=31\frac{1581}{51} = 31511581=31Because this is true, the answer must be correct.Practice Other Division Problems Like This OneIf 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 76 equals 65?2 divided by what equals 17?What is 9/19 divided by 77?What is 10/20 divided by 6/13?What is 57 divided by 11/3?