n 2 multiple choice worth 5 points) (05.02) solve the following system of equations x - 2y = 6 2x - 4y = 10

the solution is (1/2, -11/4)

Step-by-step explanation:

Given the system

x - 2y = 6

2x - 4y = 10

Multiply the second equation by -1/2, resulting in the revised system

       x - 2y = 6

       x + 2y = -5

       2x = 1, so x = 1/2.  

Subbing 1/2 for x in the first equation results in

1/2 - 2y = 6.

Multiply all terms by 2 to eliminate the fractional coefficient 1/2:

1 - 4y = 12, so y = -11/4

and the solution is (1/2, -11/4).

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.