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B-p = 500
Kalikan 3
3b - 3p = 1500
3b + 4p = 12000
3b - 3p = 1500
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7p = 10500
P = 1500
3b - 3p = 1500
3b - 3x1500 = 1500
3b = 1500 + 4500
3b = 6000
B = 2000
2b + p =
2.2000 + 1500
4000 + 1500 = 5500
b=pensil
a=b+500
3a+4b=12.000
3(b+500)+4b=12.000
3b+1500+4b=12.000
7b=10.500
b=1.500
a=1500+500=2000
2a+b=2(2000)+1500=5500