Question

Obtain a pair of linear equation in two variables The sum of the cost of 1 kg apple and 1 kg pine-apple is Rs. 150 and the cost of 1 kg apple is twice the cost of 1 kg pine apple
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Answer 1

Solution :

Let the cost of 1kg apple = Rsx

cost of 1kg pine-apples = Rsy

According to the problem given,.

x + y = Rs 150 ---( 1 )

and

cost of 1kg apple is twice the cost

of 1kg pine-apples.

x = 2y ---( 2 )

Therefore ,

Required pair of linear equations in

two variables are ,

x + y = 150 ---( 1 )

x = 2y -----( 2 )