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3x + 2y = 7 → y = (7 - 3x)/2 ........ (i)
4x - 3y = -2 → y = (4x + 2)/3 ......... (ii)
Igualamos (i) con (ii)
(7-3x)/2 = (4x+2)/3
3(7-3x) = 2(4x+2)
21 - 9x = 8x + 4
17 = 17x
Entonces: y = (7 - 3*1)/2
Eso es todo! Saludos :)
Jeyson(Jmg)