Question

if x=2 and y=1 are the solution of equation 9kx+12ky=90, then find the value of k​

Answer 1

Answer:

k=3

Step-by-step explanation:

9(2)k + 12(1)k = 90

18k + 12k = 90

30k = 90

k = 90/30

k = 3

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Answer 2

The value of k for the given equation is 3

Step-by-step explanation:

Given:

x=2 & y=1 are the solutions to the equation 9kx+12ky=90

To find:

value of k

Solution:

The values of x & y for the equation are given

As they say both the values are the solution to the equation

Putting the values in the equation

9kx+12ky=90

⇒ 9k(2)+12k(1)=90

⇒ 18k+12k=90

adding the like terms here

∴ 30k = 90

shifting like terms together

∴ k = 90/30

∴ k = 3

The value of k for the equation 9kx+12ky=90 is 3

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