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3b+1p=9.000 |x4| 12b+4p=36.000
_____________ -
2p=3000
p= 1.500
4b+2p=13.000 |x1| 4b+2p=13.000
3b+1p=9.000 |x2| 6b+2p=18.000
___________ -
-2b =-5000
b=2.500
5(2.500)+2(1.500) = 12.500 + 3000
= 15.500
3x + y = 9000
maka x=2500
y= 1500
5x+2y = 5.2500+2.1500
=12500+3000
=15500