Question

1- Resolva os sistemas

B - 5x-4y = 15
6x-4y= 18


C - X-y = 3
X+3= 1

Answer 1

B) -5x + 4y = 15
6x - 4x = 18
x= 23
C) - x - y = 3 ( 3 )

x + 3y = 1
- 3x - 3y = 9
x + 3y= 1
- 2x= 8 ( - 1 )
2x = - 8
x = -8/2
x = - 4