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1) 5m - 3n = 19 (- 2)
2) 2m - 5n = 19 (5)
Multiplicas las ecuaciones por los números indicados a la derecha de las mismas.
- 10m + 6n = - 38
10m - 25n = 95
-----------------------
0m - 19n = 57
- 19n = 57
n = 57/-19
n = - 3
El valor de n lo reemplazas en ecuación 2
2m - 5n = 19
2m - 5 (- 3) = 19
2m + 15 = 19
2m = 19 - 15
2m = 4
m = 4/2
m = 2
Respuesta.
m = 2
n = - 3
2m -5n =19 ....... II (-5)
10m - 6n = 38
-10m +25n = -95
---------------------------
19n = -57
n = 57/19
n = -3 ...... III
III en I
5m -3n= 19
5m - 3(-3) = 19
5m +9 = 19
5m = 19-9
5m = 10
m = 10/5
m = 2
CS = (2;-3)