Jawaban:
21.000
Penjelasan dengan langkah-langkah:
Misal
Buku = X
Bulpen = Y
Maka Didapat Persamaan
5x + 4y = 55.000....1
4x + 5y = 53.000....2
2x + 3y = 50.000.....3
Eliminasi x Pers 1 dan 2
5x + 4y = 55.000 |4| 20x + 16y = 220.000
4x + 5y = 53.000 |5| 20x + 25y = 265.000
__________________-
-9y = -45.000
-9y = -45
y = -45.000/-9
y = 5.000
Substitusi y ke pers 1
5x + 4y = 55.000
5x + 4(5.000) = 55.000
5x + 20.000 = 55.000
5x = 55.009-20.000
5x = 35.00
x = 35.000/5
x = 7.000
Maka seharusnya ari 2x + 3y = 50.000
2(7.000) + 3(5.000) = 50.000
29.000 = 50.000
= 50.000-29.000
= 21.000 → seharusnya ali mendapatkan kembalian sebesar itu
Semoga membantu
semangatt
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Jawaban:
21.000
Penjelasan dengan langkah-langkah:
Misal
Buku = X
Bulpen = Y
Maka Didapat Persamaan
5x + 4y = 55.000....1
4x + 5y = 53.000....2
2x + 3y = 50.000.....3
Eliminasi x Pers 1 dan 2
5x + 4y = 55.000 |4| 20x + 16y = 220.000
4x + 5y = 53.000 |5| 20x + 25y = 265.000
__________________-
-9y = -45.000
-9y = -45
y = -45.000/-9
y = 5.000
Substitusi y ke pers 1
5x + 4y = 55.000
5x + 4(5.000) = 55.000
5x + 20.000 = 55.000
5x = 55.009-20.000
5x = 35.00
x = 35.000/5
x = 7.000
Maka seharusnya ari 2x + 3y = 50.000
2(7.000) + 3(5.000) = 50.000
29.000 = 50.000
= 50.000-29.000
= 21.000 → seharusnya ali mendapatkan kembalian sebesar itu
Semoga membantu
semangatt