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Tenemos.
x + 1 y - 1
------- + ---------- = - 1 Pasa a comun denominador 6
3 6
2(x + 1) y - 1 - 6
----------- + ------------ = -------- Simplificas el 6
6 6 6
2(x + 1) + (y - 1) = - 6
2x + 2 + y - 1 = - 6
y = - 6 - 2x - 2 + 1
y = - 2x - 8 + 1
y = - 2x - 7
Respuesta.
y = - 2x - 7