tlong y kk... no.22 jwbnnya pliss.... bsok dikumpul kk.... pake caranya y kk....

misal
mobil=x
motor=y

3x+5y=17000-> x2->6x+10y=34000
4x+2y=18000-> x5->20x+10y=90000

6x+10y=34000
20x+10y=90000
-------------------------- -
-14x=-56000
x=4000 → mobil

4x+2y=18000
4(4000)+2y=18000
16000+2y=18000
2y=18000-16000
2y=2000
y=1000 → motor

ditanya 20 mobil dan 30 motor?
20x+30y=?
20(4000)+30(1000)
80000+30000
110.000

jadi 20 mobil dan 30 motor=Rp. 110.000

mobil = x
motor = y
3x + 5y = 17000 | x2| 6x + 10y = 34000
4x + 2y = 18000 | x5| 20x+10y = 90000
_______________ -
-14x. =-56000
x. = 4000
3x + 5y = 17000
3 . 4000 + 5y= 17000
12000 + 5y = 17000
5y = 17000-12000
5y = 5000
y= 1000
Ditanya 20x + 30y
20 . 4000 + 30 . 1000
80000 + 30000 = 110000