Respostas

2014-08-20T21:54:43-03:00
12x-10=5x+11
12x-5x=11+10
7x=21
x=21/7
x=3

14-3x=2x+29
-3x-2x=29-14
-5x=15
x=15/-5
x=-3

8x-9=2x+11
8x-2x=11+9
6x=20
x=20/6
x=3,3

10-4x=9-2x
-4x+2x=9-10
-2x=-1
x=-1/-2
x=0,5
Espero ter ajudado Bjus da Nessa