Question

a professora pediu a seus alunos que resolvessem a equaçao 7x+4=19

Answer 1

7x+4=19 
7x=19-4
7x=15
x=15/7

Answer 2

7x + 4 = 19
7x = 19 - 4
7x = 15
x = 15
     ___
       7

V = {15/7}