Respuestas
Respuesta:
son 6 si no esta bien lo siento
Respuesta:
2a + b - 3c = 7
5a - 4b + c = -19
a - b - 4c = 4
A =-1
B = 3
C = -2
Explicación:
2a + b - 3c = 7
a - b - 4c = 4
3a - 7c = 11
3a - 7c = 11 4* = 2a + b - 3c = 7 11* = 3a - 7c = 11
13b - 11c = 9
8a + 4b - 12c = 28 33a - 77c = 121
5a - 4b + c = -19
13b -11c = 9 (-7)* = 13b - 11c = 9
-91b + 77c = -63
33a - 77c = 121
-91b + 77c = -63
-58a = 58
a = \frac{58}{-58\\}
a = -1
3a - 7c = 11
3(-1) - 7c = 11
-3 - 7c = 11
-7c = 11+3
-7c = 14
c = 14 / -7
c = -2
2a + b - 3c = 7
2(-1) + b - 3(-2) = 7.
-2 + b + 6 = 7
b + 4 = 7
b = 7 - 4
b = 3
espero que te sirva