Soal 6

Dina, Ety, dan Feby belanja di toko yang sama. Dina membeli 5 bungkus mie dan 2 kaleng susu kental seharga Rp. 25.500,00. Ety membeli 10 bungkus mie dan 3 kaleng susu kental seharga Rp. 42.000,00. Jika Feby membeli 1 bungkus mie dan 1 kaleng susu kental, Feby harus membayar sebesar ……………..

Pembahasan

Kita misalkan mie dengan x, sedangkan susu dimisalkan y

maka persamaannya akan menjadi

5x+2y=25.500

10x+3y=42.000

maka x+y = … ?

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