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1) x + y = 1
2) x - y = 2
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2x + 0y = 3
2x = 3
x = 3/2
Reemplazo el valor de x en ecuación .
x - y = 2
3/2 - y = 2
- y = 2 - 3/2
- y = (2 * 2 - 3)/2
- y = (4 - 3)/2
- y = 1/2
y = - 1/2
Solución :
x = 3/2
y = - 1/2