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You get rid of everything that is NOT the variable. Be sure to do the same operation on both sides. Here is an example:2x + 3 = 15

First, you might get rid of the 3. To do this, you need to subtract 3 on both sides:

2x + 3 - 3 = 15 - 3

2x + 0 = 12

2x = 12

Note: In practice, you will often write the last step directly. The previous steps are only to clarify what is going on.

Next, divide both sides by 2:

2x/2 = 12/2

x = 6

Q: How do you isolate a variable in an equation?

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segregation or apartheid

divide by 51

n - 8 = 5 n = 13

As many solutions as there are points in the domain.

-- You select an operation. -- You apply the same operation to each side of the equation. -- You keep doing both steps until the equation says (the variable) = (the value of the variable)

Related questions

When you solve a one-variable equation, your goal is to isolate the variable.To isolate the variable means to make it be alone on one side of the equals sign.In the equation shown here, you can isolate the variable by subtracting 9 from both sides of the equation and simplifying

Isolating a single variable in terms of the rest of the equation provides a solution to that variable. That is, if you know the equation that equals the variable, then you can figure out its value.

segregation or apartheid

To isolate a variable, you need to perform inverse operations to the ones applied to the variable. This involves moving constants to the other side of the equation, and then using operations like addition, subtraction, multiplication, or division to isolate the variable on one side of the equation.

squared

Division

You isolate variables in math because the point of an equation is to solve for the variables. By isolating the variables you have learned what that variable stands for and thus solved the equation.

divide by 51

Isolate the variable

In algebra, its to move the pieces of the equation around so that the variable is isolated to only one side of the sign

isolate the variable

That depends on the equation. In general, you'll try to isolate the variable, by using operations (on both sides of the equation) that get rid of anything other than the variable, on the side the variable is on.