Answer :

To Solve: 2x + 3y = 11.........(i)

                2x - 4y = - 24..........(ii)


Solving by substitution method,

From equation (i)

2x = 11 - 3y..........(iii)

putting value of 2x from equation (iii) to equation (ii)

(11 - 3y) - 4y = - 24


⇒ 11 - 7y = - 24


⇒ - 7y = -35


Putting value of y in equation (iii) we get,


2x = 11 - 3 × 5 = 11 - 15 = - 4


x =


Now , putting values of x and y in equation


y = mx + 3


5 = -2 m + 3




Value of m is -1

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