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1) 3x + 2y = 4
2) 8x - 2y = 7
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11x + 0y = 11
11x = 11
x = 11/11
x = 1
El valor de x lo reemplazo en ecuación 1
3x + 2y = 4
3 (1) + 2y = 4
3 + 2y = 4
2y = 4 - 3
2y = 1
y = 1/2
Respuesta.
x = 1
y = 1/2
8x=7+2y .... X= (7+2y)/8
3[(7+2y)/8] + 2y =4
(21+6y)/8 +2y=4
(21 + 6y + 16y) /8 = 4
21+ 22y = 4 (8)
22y = 32-21
Y= 11/22 = 1/11
X= (7+ 2(1/11)) /8
X = (7+ 2/11) / 8=( 79/11)/8 = 79/11(8) = 79/88