
Sistem persamaan linear dua variabel (SPLDV)
Presentation
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
LISDIANA AZ
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by LISDIANA AZ
2
bahkan terkadang belanja pada online shop lebih murah dibanding belanja di toko/ warung sebanarnya
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kita sederhanakan permasalahannya yaitu sebagai berikut:
Pasha membeli 1 bola dan 2 pasang sepatu dengan harga Rp800.000,00 Yusuf membeli 2 bola dan 1 pasang sepatu dengan harga Rp850.000,00
misalkan kita sepakati
bola menjadi variabel b dan
sepasang sepatu menjadi variabel t
soal menjadi SPLDV 1b + 2t = 800.000
2b + 1t = 850.000
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eliminasi t
1b + 2t = 800.000 / x1
2b + 1t = 850.000 / x2
diperoleh
1b + 2t = 800.000
4b + 2t = 1.700.000 -
-3b + 0 = - 900.000
3b = 900.000
b = 300.000
subtitusi nilai b ke persamaan I
1b + 2t = 800.000
maka didapat
300,000 + 2t = 800.000
2t = 500.000
t = 250.000
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harga bola Rp300.000
harga sepasang sepatu Rp250.000
demikianlah penyelesaian permasalahan dengan menggunakan SPLDV metode campuran.
by LISDIANA AZ
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