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1) 2x - 3y = 1
2) x + 2y = 11
Despejo x en ecuación 2.
x + 2y = 11
x = 11 - 2y
Sustituyo x en 1.
2x - 3y = 1
2 (11 - 2y) - 3y = 1
22 - 4y - 3y = 1
22 - 7y = 1
- 7y = 1 - 22
- 7y = - 21
y = - 21/-7
y = 3
Sustituyo el valor de y en el despeje de x.
x = 11 - 2y
x = 11 - 2 (3)
x = 11 - 6
x = 5
Solución :
x = 5
y = 3