Question

responda x sobre 2 = Y sobre 5 Y menos x é igual a 6

Answer 1

           {x/2 = y/5 ---> 5x = 2y
           { y - x = 6 --> y = 6+x  --> substitui na outra equação

                                {5x = 2y
                                 5x = 2(6 + x)
                                 5x = 12 + 2x
                                 5x - 2x = 12
                                        3x = 12 --> x = 12/3
                                                          x =  4
                                       y = 6+x ---> y = 10

   Verificando a igualdade:
                                       x/2 = y/5
                                       4/2 = 10/5
                                         2  =  2