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Verified answer
Sepatu = xSandal = y
Persamaan #1 : 2x + 3y = 175.000
Persamaan #2 : 3x + 4y = 255.000
Ditanya : x = ? dan 2y = ?
2x + 3y = 175.000...(x 3) 6x + 9y = 525.000
3x + 4y = 255.000...(x 2) 6x + 8y = 510.000
---------------------------- (-)
y = 15.000
2y = 2 (15.000)
2y = 30.000 ............Harga 2 pasang sandal adalah Rp. 30.000,00
2x + 3y = 175.000
2x + 3 ( 15.000) = 175.000
2x + 45.000 = 175.000
2x = 175.000 - 45.000
2x = 130.000
x = 65.000............ Harga sepasang sepatu adalah Rp. 65.000,00
kita misalkan sepatu sebagai x dan sandal sebagai y.
2x + 3y = 175.000...(3)
3x + 4y = 255.000...(2)
maka;
6x + 9y = 525.000
6x + 8y = 255.000
_______________ _
y = 15.000
substitusikan.
2x + 3y = 175.000
2x + 3(15.000) = 175.000
2x = 130.000
x = 65.000
maka;
harga sepasang sepatu (x) = 65.000
harga 2 pasang sandal (y) = 2(15.000)
= 30.000
maafkan jika saya salah c: