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An linear equation is an algebraic equation that contains a variable to the first power and a constant. When graphed, linear equations always produce a straight line.
An example of a linear equation is y = x + 2.

en.wikipedia.org/wiki/Linear_equation

A linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of) a single variable A simple ...

www.mathsisfun.com/algebra/linear-equations.html

Example: y = 2x + 1 is a linear equation: line on a graph. The graph of y = 2x+1 is a straight line. When x increases, y increases twice as fast, so we need 2x ...

www.khanacademy.org/math/algebra-home/alg-basic-eq-ineq/alg-old-school-equations/v/algebra-linear-equations-1

Because, either way it will work. But, it is easier to do your simplifying now, when the numbers are smaller, than later, when the numbers are larger. Incredible ...

www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-linear-equations-functions

Linear equations like y = 2x + 7 are called "linear" because they make a straight line when we graph them. These tutorials introduce you to linear relationships, ...

tutorial.math.lamar.edu/Classes/Alg/SolveLinearEqns.aspx

where a and b are real numbers and x is a variable. This form is sometimes called the standard form of a linear equation. Note that most linear equations will not ...

www.eduplace.com/math/mathsteps/7/d

Linear Equations. A linear equation looks like any other equation. It is made up of two expressions set equal to each other. A linear equation is special because:.

www.mathwarehouse.com/algebra/linear_equation

Linear equations, formulas, links, video tutorials and much more.

www.purplemath.com/modules/solvelin.htm

Demonstrates, step-by-step and with illustrations, how to solve one-step linear equations using addition and subtraction.

www.mathplanet.com/education/algebra-1/formulating-linear-equations/writing-linear-equations-using-the-slope-intercept-form

Where m is the slope of the line and b is the y-intercept. You can use this equation to write an equation if you know the slope and the y-intercept.