Misalkan :
buku tulis = x
pensil = y
Eliminasi x
2x + y = 9.500 |×1|
x + 2y = 8.500 |×2|
2x + y = 9.500
2x + 4y = 17.000
-3y = -7.500
y = 2.500
y = 2.500 kepersamaan 1
2x + 2.500 = 9.500
2x = 9.500 - 2.500
2x = 7.000
x = 3.500
x = buku tulis = 3.500
y = pensil = 2.500
Maka, Harga 5 buku dan 5 pensil adalah
= 5x + 5y
= 5 × 3.500 + 5 × 2.500
= 17.500 + 12.500
= 30.000
Selamat belajar
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1 pensil = 2.500
harga 5 buku + 5 pensil = 30.000
Misalkan :
buku tulis = x
pensil = y
Eliminasi x
2x + y = 9.500 |×1|
x + 2y = 8.500 |×2|
2x + y = 9.500
2x + 4y = 17.000
-3y = -7.500
y = 2.500
y = 2.500 kepersamaan 1
2x + y = 9.500
2x + 2.500 = 9.500
2x = 9.500 - 2.500
2x = 7.000
x = 3.500
x = buku tulis = 3.500
y = pensil = 2.500
Maka, Harga 5 buku dan 5 pensil adalah
= 5x + 5y
= 5 × 3.500 + 5 × 2.500
= 17.500 + 12.500
= 30.000
Selamat belajar