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= 2x - 3x - 5 + 1
= -x - 4
= - ( x + 4 )
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5k + 4j - 2h - 8k + 6j - 7h
= 5k - 8k + 4j + 6j + ( -2h ) - 7h
= -3k + 10j -9h
= -( 3k -10j + 9h )
2) 5k+4j-2h-8k+6j-7h=-3k-9h+10j
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