Jawapan

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2016-09-17T15:12:06+08:00
9+7x -3+3x
9-3
+7x+3x
6
+10x
1 5 1
2016-09-17T15:12:39+08:00
7x+3x = -9+3
9x = -6
x = -6/9
= -2/3