bonjour
x
3 x
3 x - 2
3 ( 3 x - 2 )
3 ( 3 x - 2 ) + 6
9 x - 6 + 6
= 9 x
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bonjour
x
3 x
3 x - 2
3 ( 3 x - 2 )
3 ( 3 x - 2 ) + 6
9 x - 6 + 6
= 9 x