Question

3(x-4)-3 sobre 10 igual 3 da quanto?

Answer 1

$\frac{3x-12-3=3}{10}\\\\30x-120-3=3\\\\30x=30+120+3\\\\x=\frac{153}{30}\\\\x=5,1$

Answer 2

Boa Tarde!!! Ótima pergunta!! 

  3.(x-4)-3 =3
---------------
     10

3x-12-3=3
-----------
   10

30x-120-30=3

30x-150=3

30x=3+150

30x=+153

x=+153
    ------- = 5,1
      30

Espero ter ajudado!!