Respostas

2013-09-18T08:40:36-03:00
B)5(3-x)+2(x+1)=-x+5

 15 - 5x + 2x + 2= -x +5

5x + 2x +x = 5 - 15

8x =  -10

x= -10/8

x= -5/4


a) -x + 4(-2x)= -2x -(10+3x)

-x -8x = -2x -10 -3x

-9x= -5x -10

-9x +5x = -10

-4x = -10

x= -4/-10

x=5/2
A resposta tem que ser completa ;)
nem vi q tem a e b
vo editar aki vlw
de nada *-*