Respostas

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2014-03-12T16:11:25-03:00
A) m + 2n -r +2n -n -r
= m +4n -n -2r
= m +3n -2r

b) -6y -4x +3y -4x +2x -3y
= ( -6y +3y - 3y) + ( -4x -4x +2x )
= -6y -6x
= -6( y + x )
3 5 3