Apakah ada soal matematika yang mudah dan menyenangkan?
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Aljabar
Harga kopi 1kg dan gula 1kg adalah Rp 110.000, sedangkan harga kopi Rp 100.000 lebih mahal dibandingkan harga gula. Berapa harga gula?
X= Harga kopi
Y= Harga gula
X = Harga kopi = Y + 100.000
X + Y = 110.000
(Y + 100.000) + Y = 110.000
2Y + 100.000 = 110.000
2Y = 110.000 – 100.000
2Y = 10.000
Y = 10.000 / 2
Y = 5.000
Jadi harga gula atau Y sama dengan 5.000
X + Y = 110.000
X + 5.000 = 110.000
X = 110.000 – 5.000
X = 105.000