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4x + 3y = 9500 (x1) 4x +3y = 9500
7y = 3500
y =500
2x + 5(500) = 6500
2x + 2500 = 6500
2x = 4000
x =2000
2 buku + 4 pensil = 4000 + 2000 = 6000
4b + 3p = 9500
b = (9500-3p)/4
2 (9500-3p)/4 + 5p = 6500
4750 - 3p/2 + 5p = 6500
3,5p = 1750
p = 500
b = 9500-3 (500) / 4
b = 2000
2b + 4p = 2×2000+4×500= 6000