Question

Solve the system using elimination. 3x – 4y = 9 –3x + 2y = 9

Answer 1

x=-9 and y=-9

Explanation:

Answer 2

X=9

Y=-9

Explanation:

3x - 4y =9

-3x +2y=9 cross 3x and - 3x since they're opposite ــــــــــــــــــــــــ

-4y +2y =9 +9

-2y =18

Y =-18/2

Y= -9

Replace y in the first equation:

3x - 4 (-9)=9

3x +36=9

3x = 27

X= 27/3

X= 9

Hope this helps you.. Good luck