If the pair of linear equations x − y = 1, x + ky = 5 has a unique solution x = 2, y = 1, then the value of k is :

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MCQ (Single)Conditions for Unique Solution of Linear EquationsCBSE PYQ

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A telecommunication company came up with two plans– plan A and plan B for its customers. The plans are represented by linear equations where 't' represents the time (in minutes) bought and 'C' represents the cost. The equations are : Plan A : 3C = 20t Plan B : 3C = 10t + 300 Based on above information, answer the following questions :

CASE_STUDIESGraphical Representation of Pair of Linear EquationsConditions for Unique Solution of Linear Equations

The number of solutions of the system of equations x = 3, y = –1 is :

MCQ (Single)

Conditions for Unique Solution of Linear Equations