Question

Quanto e 7x+5 sobre 2 =27?

Answer 1

$\frac{7x +5}{2} =27 \\ \\ 7x + 5 = 54 \\ \\ 7x = 49 \\ \\ x = 7$

Answer 2

7 x + 5              27
-----------   = ----------------
      2                  1

7 x + 5 = 2 . 27
7 x + 5 = 54
7 x = 54 - 5
7 x = 49
x= 49/7
x = 7