Question

determine o valor de x nas seguintes equacoes
a) 30 x + 60 = 0
b)12 x - 4 = 0

Answer 1

a)
30 x + 60 = 0
30 x = - 60   (:10)
3x = - 6
x = - 6/3
x = - 2

b)
12x - 4 = 0
12x = 4
x = 4 (:4) =   1
     12 (:4)     3