Respostas

  • Usuário do Brainly
2013-10-23T23:06:28-02:00
A)
9x - 10 = 4x + 3 - 2x
9x - 10 = 2x + 3
9x - 2x = 3 + 10
7x = 13
x = 13/7

b)
3x + 3 = 8
3x = 8 - 3
3x = 5
x = 5/3

c)
4x - 24 = - 3
4x = - 3 + 24
4x = 21
x= 21/4
2013-10-23T23:07:14-02:00
2x + 7x - 4x + 2x = 3 + 10           7x = 13            x = 13/7 


b)  3x + 3 = 8           3x = 8 - 3          x=5/3  

c)  4x - 24 = -3      4x=-3 + 21      4x=18        x=18/4      x= 9/2