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Verified answer
Misal :penggaris = x
penghapus = y
x = 4y
3x + 2y = 42.000
x + 4y = ...??
Jawab :
3x + 2y = 42.000
3 (4y) + 2y = 42.000
14y = 42.000
y = 3.000
x = 4y
x = 4 (3.000)
x = 12.000
Maka,
x + 4y
= 12.000 + 4 (3.000)
= 24.000
Jadi,harga 1 penggaris dan 4 penghapus adalah Rp 24.000,00