Question

3) Resolver as seguintes equações (na incógnita x):


a) 5/x - 2 = 1/4 (x 0)                                                      (R: x = 20/9)

Answer 1

 5/x - 2 = 1/4

     5 =  1
  x - 2   4

1(x - 2) = 5.4 ==>  x - 2 = 20

x = 20 + 2 ==> x = 22