3x+2y=33.000.
5x+4y=57.000
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3X + 2Y = 33000
5X + 4Y = 57000
3X = 33000 - 2Y
X =11000 - (2/3)Y
Reemplazo en 5X + 4Y = 57000
5[11000 - (2/3)Y] + 4Y = 57000
55000 - (10/3)Y + 4Y = 57000
(12/3)Y - (10/3)Y = 57000 - 55000
(2/3)Y = 2000
2Y = 2000(3)
2Y = 6000
Y = 3000
Ahora hallo X
X =11000 - (2/3)Y
X =11000 - (2/3)(3000)
X = 11000 - 2000
X = 9000
Rta: X = 9000, Y = 3000
5X + 4Y = 57000
3X = 33000 - 2Y
X =11000 - (2/3)Y
Reemplazo en 5X + 4Y = 57000
5[11000 - (2/3)Y] + 4Y = 57000
55000 - (10/3)Y + 4Y = 57000
(12/3)Y - (10/3)Y = 57000 - 55000
(2/3)Y = 2000
2Y = 2000(3)
2Y = 6000
Y = 3000
Ahora hallo X
X =11000 - (2/3)Y
X =11000 - (2/3)(3000)
X = 11000 - 2000
X = 9000
Rta: X = 9000, Y = 3000
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