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Método de reducción.
1) 5x - 2y = - 3 (2)
2) - 2x - y = - 6 (5)
10x - 4y = - 6
-10x - 5y = - 30
-----------------------
0x - 9y = - 36
- 9y = - 36
y = -36/-9
y = 4
Reemplazo y = 4 en ecuación 2.
- 2x - y = - 6
- 2x - 4 = - 6
- 2x = - 6 + 4
- 2x = - 2
x = -2/-2
x = 1
Solución :
x = 1
y = 4
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1) -3x - 3y = - 8 (4)
2) 4x - 6y = 14 (3)
- 12x - 12y = - 32
12x - 18y = 42
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0x - 30y = 10
- 30y = 10
y = 10/-30---simplificamos la décima.
y = -1/3
Reemplazo y = - 1/3 en ecuación 2 .
4x - 6y = 14
4x - 6 (-1/3) = 14
4x + 6/3 = 14
4x + 2 = 14
4x = 14 - 2
4x = 12
x = 12/4
x = 3
Solución :
x = 3
y = -1/3