Respostas

2014-02-01T19:30:04-02:00
8-2(2x+1)=2(-3x+1)
8-4x-2=-6x+2
-4x+6x=2-6
2x=-4
x=--2


9-3(x+3)+2(2x-4)=12(2x-7)
9-3x-9+4x-8=24x-84
x-24x=-84+8
-23x=76
x=-76/23


21(x+1)-14(x-1)=12x
21x+21-14x+14=12x
7x-12x=35
-5x=35 (-1)
x=-7


2x-8/10-22-x/3=2
60x-24-660-10x=60
50x=60+684
50x=744
x=744/50


4x-14/5=6+6x+10/4
80x-56=120+120x+50
200x=226
x=226/200
x=1.13