86 Divided by What Equals 21?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 can we divide 86 by to equal 21?Solving 86 Divided by What Equals 21Here’s how you would set up this question as an equation:86x=21\frac{86}{x} = 21x86=21The 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 86:86=21∗x86 = 21*x86=21∗xThen we can isolate x on the right side of the equation by dividing both sides by 21:8621=x\frac{86}{21} = x2186=xWhen 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=4.095x = 4.095x=4.095Practice 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 98 equals 43?8 divided by what equals 54?What is 16/17 divided by 6?What is 19/11 divided by 18/13?What is 76 divided by 12/9?