Question

2. - 2x - 9y = - 25
- 4x - 9y = -23

Answer 1

x = -1

y = 3

Explanation:

EQ 1: -2x - 9y = -25

EQ 2: -4x - 9y = -23

Multiply EQ 2 by -1: 4x + 9y = 23

Now solve:

-2x - 9y = -25

4x + 9y = 23

___________

2x = -2

x = -1

Now substitute:

-2(-1) - 9y = -25

2 - 9y = -25

-9y = -27

y = 3