Question

resolva equaçao de 1 grau
a 18x-34=6

b 23x-16=14-17x


c 10y-5(1+y)=3(2y-2)-20

Answer 1

 a)
           18x - 34 = 6
                  18x = 6 + 34
                  18x = 40
                      x = 40/18
                                          x = 20/9

  b)
          23x - 16 = 14 - 17x
   reduzindo termos semelhantes
          23x + 17x = 14 + 16
                    40x = 30
                        x = 30/40
                                          x = 3/4

  c)
           10y - 5(1 + y) = 3(2y - 2) - 20
         efetuando
          10y - 5 - 5y = 6y - 6 - 20
        reduzindo termos semelhantes
          10y - 5y - 6y = - 6 - 20 + 5
                          - y = - 21
                                              y = 21