Q5 of 186 Page 4

Solve the following system of linear equations by cross - multiplication method.

ax – ay = 2


(a – 1)x + (a + 1)y = 2(a2 + 1)


[Hint: Let u = and v = ]

Given, pair of equations is


ax – ay = 2


(a – 1)x + (a + 1)y = 2(a2 + 1)


By cross - multiplication method, we have






On taking I and III ratio, we get




On taking II and III ratio, we get




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4

Which of the following pair of linear equations has unique solution, no solution or infinitely many solutions. In case there is a unique solution, find it by using cross - multiplication method:

x + y = 2


2x + 2y = 6

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Solve the following system of linear equations by cross - multiplication method.



[Hint: Let u = and v = ]

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