Respostas

2014-08-12T11:51:23-03:00
-4(x-5)+10=-(x+9)
-4x+20+10=-x-9
-4x+20+10+x+9=0
-3x+39=0
-3x=-39(-1)
3x=39
x=39/3
x=13
  • Usuário do Brainly
2014-08-12T12:00:01-03:00
-4(x-5)+10=-(x+9)
-4x + 20 + 10 = -x - 9
-4x + x = - 9 - 10 - 20
-3x = -39 . (-1)
3x = 39
x = 39 : 3
x = 13