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-9y-6=4-4y
-5y=10
y=-2
6y - 3(5y + 2) = 4(1 - y)
6y - 15y - 6 = 4 - 4y
- 9y - 6 = 4 - 4y
- 6 - 4 = - 4y + 9y
- 10 = 5y
- 10/5 = y
- 2 = y
Respuesta.
y = - 2