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beras=y
6x+10y=84.000 | ×10|
10x+5y=70.000 |×6 |
60x+100y=840.000
60x+30y=420.000 —
0x+70y=420.000
70y=420.000
y=6.000
6x+10y=84.000 |×5|
10x+5y=70.000 |×10|
30x+50y=420.000
100x+50y=700.000
-70x=-280.000
x=4.000
1kg terigu=4.000
1kg beras=6.000
8kgterigu=8×4.000=32.000
20kgberas=20×6.000=120.000+
Rp 152.000
y=Beras
6x+10y=84.000 ×5
10x+5y=70.000 ×3
=
30x+50y=420.000
30x+15y=210.000
_________________-
35y=210.000
y=6.000
subs.....1
6x+10y=84.000
6x+10(6.000)=84.000
6x+60.000=84.000
6x=84.000-60.000
6x=24.000
x=24.000÷6
x=4.000
Jadi,=4.000(8)+20.000(6)=152.000