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CPTSuccess Revision Notes – Quantitative Aptitude Chapter 2. Equations
Chapter 2. Equations ,[object Object]
Simple equation
 A simple equation in one unknown x is in the form
 ax + b = 0, where a, b are known as constants and a ≠ 0
 A simple equation has only one root
 Simultaneous linear equations in two unknownThe general form of a linear equation in two unknowns x and y is ax + by + c = 0 where a and b are non-zero coefficients.  Two equations a1x + b1y + c1 = 0 and a2x + b2y + c2 = 0 form a pair of simultaneous equations in x and y. A value for each unknown which satisfies both equations at the same time gives the roots / solution of the equation. ,[object Object],© Revision Notes – Quantitative Aptitude CPTSuccess www.cptsuccess.com
Chapter 2. Equations ,[object Object],Elimination method: In this method one unknown is eliminated, thus reducing two linear equations to a linear equation in one unknown. This unknown is solved and its value substituted in the equation to find the other unknown. © Revision Notes – Quantitative Aptitude CPTSuccess www.cptsuccess.com

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