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sepatu = x
sandal = y
diperoleh persamaan :
2x + 3y = 195.000 ............>dikali 3
3x + 4y = 280.000 ............> dikali 2
menjadi :
6x + 9y = 585.000
6x + 8y = 560.000 -
y = 25.000
subtitusi :
2x + 3y = 195.000
2x + 3 (25.000) = 195.000
2x + 75.000 = 195.000
2x = 195.000 - 75.000
2x = 120.000
x = 60.000
maka harga sepasang sepatu + 2 sendal = 60.000 + 2(25.000)
= 60.000 + 50.000 = Rp 110.000
sendal = y
2x + 3 y= 195 000 ⇒x3 = 6x + 9y = 585 000
3x + 4 y 280 000 ⇒x2 = 6x + 8y = 560 000
di kurang kan jadi
y =25 000
subtitusi kan di persama an
2x + 3(25000) =195 000
2x +75000 =195 000
2x= 195000 - 75000
2x =120 000
x= 120 000/2 = 60 000
x+ 2y =
60 000 + 2(25000
=60000 + 50000
=110 000
semoga membantu