Respostas

2013-10-28T10:56:32-02:00
9-3x=x+4 => x=5/4

4x-8=6x-6 => 2x-4=3x-3 => x=-1

c) 4x+6=3x+4 =>x=-2

d)(2y-2)+(10-5y)=6y+6=>-4y+8=6y+6 =>2y=2 = x=1

e)2-t+1=3t-9-2t = >2t=12  => t=6
5m+1 - 6m+1=20-4m => -m+2=20-4m = > 3m=18 =>m=6

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