Question

3. Sоlvе з+2У-1 and x-2y = 13. (D)
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Answer 1

The value of x and y for the given two linear equation is x = 7 , y = - 3

Explanation:

Given two linear equation as :

x + 2 y - 1 = 0

Or, x + 2 y = 1 ..........A

x - 2 y = 13 ............B

Now, Solving both equations A and B

i.e (x + 2 y) + (x - 2 y) = 1 + 13

Or, (x + x) + (2 y - 2 y) = 14

Or, 2 x + 0 = 14

Or, 2 x = 14

∴ x =
`(14)/(2)`

i.e x = 7

Now, Put the value of x into eq A

So, 7 + 2 y = 1

Or, 2 y = 1 - 7

Or, 2 y = - 6

∴ y =
`(- 6)/(2)`

i.e y = - 3

So, The value s of x = 7 and y = - 3

Hence, The value of x and y for the given two linear equation is x = 7 , y = - 3 Answer