Question

Hurrry 100 points both in elimination solving show your work

1) 7x - 9y =-30

-3x - 6y = 3


2) 3x +2y =9

2x +6y=6

Answer 1

`1. \: x = (9y - 30)/(7) \: x = - 1 - 2y \\ \\ 2. \: x = (9 - 2y)/(3) \: x = 3 - 3y`

Explanation:

`1. \: 7x = - 30 + 9y \\ 7x = 9y - 30 \\ x = (9y - 30)/(7) \\ \\ - 3(x + 2y) = 3 \\ x + 2y = - 1 \\ x = - 1 - 2y \\ \\ 2. \: 3x = 9 - 2y \\ \\ (x + 3y) = 6 \\ x + 3y = (6)/(2) \\ x + 3y = 3`

Answer 2

2

Explanation:

6y=18. (3₁-2). 3) -2x +9y=-4. 2x+3y=-20. (-7,-2). 5) 2x + 5y = 0 ... -10x + 5y = 30. (-3,0). 15) 3x-2y = −6 x-2y=-10. (2,6). 17) 3x +9=-3y. 3y=-5x-11.