Question

4. Find K if x = -5, y = 2 is a solution of the equation 2x – y + k = 0.​

Answer 1

5,Y=2=64Y
2x-y+k=0=280xyk

Answer 2

Given equation:

• 2x - y + k = 0

Here,

• x = - 5
• y = 2

To find:

• Value of k?

Solution:

We know that,

If x and y are the solution of given equation,

So, when we put the value of x and y in it then, equation must be equal to zero.

★ Now, Putting these values in given equation,

→ 2(-5) - (2) + k = 0

→ - 10 - 2 + k = 0

→ - 12 + k = 0

→ k = 12

Hence, Value of k is 12.

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Verification:

→ 2(-5) - (2) + 12 = 0

→ - 10 - 2 + 12 = 0

→ -12 + 12 = 0

→ 0 = 0

→ LHS = RHS

Hence, Proved!