Question

form the pair of linear equations in the following problems and find their solutions by any algebraic method

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Answer 1

let the no. of questions correct in the test be x

let the no. of questions wrong in the test be y

given

,yash had scored 40 marks so

3x-y=40---eq(1)

if yash would scored 50 marks

4x-2y=50---eq(2)

solving the equations

eq(2)-2×eq(1)》》

(4x-2y-50)-6x+2y+80=0

-2x+30=0

x=15

and y=5

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Answer 2

Answer:

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