Respostas

  • Usuário do Brainly
2013-11-11T16:24:22-02:00
3x = x + 8
3x - x = 8
2x = 8
x = 8/2
x = 4


4k - 8 = 16
4k = 16 + 8
4k = 24
k = 24/4
k = 6


4x + 12 = - 20
4x = - 20 - 12
4x= - 32
x = - 32/4
x = - 8


7x - 4 = x + 2
7x - x = 2 + 4
6x = 6
x = 6/6
x = 1


4x + 2 = x+ 11
4x - x = 11 - 2
3x = 9
x = 9/3
x = 3