Question

if (2,k) is the solution of equation 3x + y - 12 = 0 then the value of k is :
a.) 3 c.) 4
b.) 6 d.) -6​

Answer 1

Answer:

B) 6

Step-by-step explanation:

x = 2y = k

so, 3×2 + k - 12 = 0

6 + k - 12 = 0

6 + k = 12

k = 6

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Answer 2

The required value of k = 6

Given :

(2,k) is the solution of equation 3x + y - 12 = 0

To find :

The value of k is

a) 3

b) 6

c) 4

d) - 6

Solution :

Step 1 of 2 :

Write down the given equation

Here the given equation is

3x + y - 12 = 0

Step 2 of 2 :

Find the value of k

Here it is given that (2,k) is the solution of equation 3x + y - 12 = 0

Thus we get

( 3 × 2 ) + k - 12 = 0

⇒ 6 + k - 12 = 0

⇒ k - 6 = 0

⇒ k = 6

Hence the correct option is b) 6

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