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4b + 3p = 13.500 {{ x3 }}
3b+ 2p = 9.750 {{4}}
.
12b+9p = 40.500
12b+8p = 39.000
0. 1p = 1.500
p= 1.500/1
p= 1.500
cari b = 4b + 3p = 13.500
4b + 3(1500)=13.500
4b +4500 = 13.500
4b = 13.500 - 4500
4b = 9000
b= 9000/4
b = 2.250
jadi 2b+3p
2(2250)+3(1500)
= 4500+4500
=9.000
ket: p= pensil
b= buku