Respostas

2014-08-01T11:25:08-03:00
4x-4(2x-1)=6x-20
4x-8x+4=6x-20
4x-8x-6x=-20-4
-10x=-24 .(-1)
10x=24
x=24/10
x=12/5


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  • Usuário do Brainly
2014-08-01T14:50:45-03:00
4x-4(2x-1)=6x-20
4x - 8x + 4 = 6x - 20
4x - 8x - 6x = - 20 - 4 
- 10 x = - 24 . (-1)
10x = 24
x = 24/10
x = 12/5