Q45 of 54 Page 77

and ax – by = 2ab. Solve by cross multiplication method.


ax – by – 2ab = 0


Cross Multiplication Method: For equations:


a1x + b1 y + c1 = 0


a2x + b2 y + c2 = 0



After this we get,



And thus we have our solution,




For our question we have,


cross multiply







y = – a


Equate first and last part





x = b


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