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5x + 3y = 14.500
6x + 3y = 19.500
-x = -5000
x = 5000
5x + 3y = 19.500
6(5000) + 3y = 19.500
30000 + 3y = 19.500
3y = 19.500 - 25.000
3y = - 10.500
y = -10.500/3
y = 3500
5x +4y = 5(5000) + 4(3500)
=25000 + 14000
=39.000