Question

Solve the system of equations

2r - 6y= 28
-x-y = 14


PLEASE HELP

Answer 1

`\displaystyle [-7, -7]`

Explanation:

{2x - 6y = 28

{−x - y = 14

−⅙[2x - 6y = 28]

{−⅓x + y = −4⅔

{−x - y = 14

____________

`\displaystyle (-1(1)/(3)x)/(-1(1)/(3)) = (9(1)/(3))/(-1(1)/(3)) \\ \\`

`x = -7`[Plug this back into both equations above to get the y-coordinate of −7];
`\displaystyle -7 = y`

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