ayuda quien se spa la respueta le doy corona porfa no respondan si no saben
Respuestas a la pregunta
Respuesta:
1. -2x + y = 8 -> -8x + 4y = 32
____________________
-8x + 4y = 32
x - 4y = 5
-------------------
-7x = 37
x = -37/7
____________________
-2(-37/7) + y = 8
74/7 + y = 8
y = 18/7
__________________________
2. 2x - 7y = 9 -> -10x + 35y = -45
_______________________
10x - 3y = 13
-10x + 35y = -45
------------------------
32y = -32
y = -1
_______________________
2x + 7 = 9
2x = 2
x = 1
__________________________
3. 4x + 3y = 10 -> 8x + 6y = 20
_____________________
8x + 6y = 20
5x - 6y = -7
------------------
13x = 13
x = 1
_____________________
4 + 3y = 10
3y = 6
y = 2