Question

Select the correct answer.

Answer 1

Answer: x= 10. y= 2

Step-by-step explanation:

From the first statement :

$x + y = 12$

And from the second statement :

$x - 2y = 6$

combining the two equations we have :

$x + y = 12$ .......................... equation 1

$x - 2y = 6$ .......................... equation 2

solving the system of simultaneous linear equation by substitution method , from equation 1 , make $x$ the subject of the formula , that is

$x = 12 - y$ ........................... equation 3

substitute  $x = 12 - y$ into equation 2 , then we have

$12 - y - 2y = 6$

$12 - 3y = 6$

$12 - 6 = 3y$

$6 = 3y$

Therefore : $y = 2$

substitute $y = 2$ into equation 3 to find the value of x , that is

$x = 12 - y$

$x = 12 - 2$

$x = 10$

Answer 2

Answer:

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