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Algebraic Methods of Solving a Pair of Linear Equations  (
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Mathematics Class X > Pair of Linear Equations in Two Variables > Algebraic Methods of Solving a Pair of Linear Equations
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Q. A two digit number is obtained by either multiplying the sum of the digits by 8 and adding 1, or by multiplying the difference of ...
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1 answer under Algebraic Methods of... 11 months ago

A. Let xy be the unknown number. ==> x = tens digit, and y = ones digit. Then from the given, 8(x+y) + 1= 10x + y, and 13(x-y) + 2 = 10x + y. <==> 2x - 7y = 1 and -3x + 14y = 2 ... link
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