### Linear Equations - GMAT Math Study Guide

Linear Equation - An equation involving variables of the first degree only (i.e., no quadratic (x 2) or cubic (x 3) terms). For example, 10x + 2 = 5x + 12 is a linear equation while x 2 + 4 = x - 5 is not a linear equation but is rather a quadratic equation. Solution - A number that, when substituted for the unknown, will make the equation true.

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