Question

sistema de suma y resta -4x +3y =-1
6x-5y=3

Answer 1

1) - 4x + 3y = - 1   (5)
2) 6x - 5y = 3        (3)

-20x + 15y = - 5
18x - 15y = 9
-----------------------
- 2x + 0y =  4

-2x = 4

x = -4/2

x = -2

Reemplazo x = - 2 en ecuación 2.

6x - 5y = 3

6 (-2) - 5y = 3

- 12 - 5y = 3

- 5y = 3 + 12

- 5y = 15

y = 15/-5

y = - 3

Solución : 

x = - 2
y = - 3