10 buku dan 4 pulpen = 36000 5b dan 8p = 27000 1b dan 1p ?

b= buku
p = pulpen

10b + 4p = 36000
5b + 8 p = 27000
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50b + 20p = 180.000
25b +

10b + 4p = 36000 DIKALI 2
5b+ 8p = 27000 DIKALI 1
20b+8p =72000
5b+ 8p =27000
15b=45000
[tex] b = \frac{45000}{15} [/tex]
b=3000
5b+8p=27000
5.3000+8p=27000
15.000+8p=27000
8p=27.000-15000
8p = 12000
[tex]p = \frac{12000}{8} [/tex]
p=1500
jadi b+p =3000 + 1500 =4500