1.

Solve x + 4y=14 7x - 3y =5

Answer» x+4y=14 ...........(i)

7x-3y=5  .............(ii)

From equation (i) x = 14 - 4y

Substitute the value of x in equation (ii)

⇒ 7 (14 - 4y) - 3y = 5

⇒ 98 - 28y - 3y = 5

⇒ 98 - 31y = 5

⇒ 93 = 31y

⇒ y = 93/31

⇒ y = 3

Now substitute value of y in equation (ii)

⇒ 7x - 3 (3) = 5

⇒ 7x - 3 (3) = 5

⇒ 7x = 14

⇒ x = 14/7 = 2

So, solution is x = 2 and y = 3.


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