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1) 2x + 3y = 7 (3)
2) - 3x + 4y = - 2 (2)
6x + 9y = 21
- 6x + 8y = - 4
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0x + 17y = 17
17y = 17
y = 17/17
y = 1
El valor de y lo reemplazo en ecuación 1
2x + 3y = 7
2x + 3 (1) = 7
2x + 3 = 7
2x = 7 - 3
2x = 4
x = 4/2
x = 2
Solución :
x = 2
y = 1