a) The Equation With one Variable:

Learn how to solve linear equations that contain a single variable. For example, solve 2(x+3)=(4x-1)/2+7. For example, solve 2(x+3)=(4x-1)/2+7. Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Khan Academy is a nonprofit with the mission of providing a free, world-class education for anyone, anywhere.

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b) The Equation With two Variables:

Linear equations in one variable can be represented in generalized form as "ax = b". Read here to know about Linear Equations with Two Variables

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c) The Equation With Three Variables:

Step 2: Substitute this value for x in equations (2) and (3). This will change equations (2) and (3) to equations in the two variables y and z. Call the changed equations (4) and (5), respectively.

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sosmath.com

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Exponential Equations:

Given a description of a real-world relationship, determine whether that relationship is linear or exponential.

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Linear Equations:

Another special type of linear function is the Constant Function ... it is a horizontal line: f(x) = C No matter what value of "x", f(x) is always equal to some constant value.

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Quadratic Equations:

Make both equations into "y =" format Set them equal to each other Simplify into "= 0" format (like a standard Quadratic Equation) Solve the Quadratic Equation! Use the linear equation to calculate matching "y" values, so we get (x,y) points as answers ...

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Radical Equations:

When you square a radical equation you sometimes get a solution to the squared equation that is not a solution to the original equation. Such an equation is called an extraneous solution. Remember to always check your solutions in the original equation to discard the extraneous solutions.

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The General Form:

General Form of Equation of a Line The "General Form" of the equation of a straight line is:

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