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- 10x - 2 dari - 8x - 12
( - 8x - 12 ) - ( - 10x - 2 )
- 8x - 12 + 10x + 2
- 8x + 10x - 12 + 2
= 2x - 10 atau 2( x - 5 )
= -8x- 10x-12-2
= -18x-14
maaf kalau salah