Jawabanmu

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2014-06-08T14:23:13+07:00
2x + y = 4, x + y = 6
| x = 6-y
| 2x + y = 4
| 2(6-y) + y = 4
| 12-2y+y=4
| 12-y=4
| 12-4=y
| y= 8 cm

x+y=6
| x+8=6
| x=6-8
| x= -2
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