Question

Resolva as equações:

a) 5x/x-2 = 1

b) 2x/3x = 1/2 + 3/4x

Answer 1

  5x          1
------- = -------
x - 2         1              multiplique cruzado

5x = x - 2
5x - x = - 2
4x = - 2
x = - 2/4
x = - 1/2
============================================
  2x         1        3
------- = ----- + -----
  3x         2       4x                    mmc = 12x

  8x         6x        9
------- = ------- + ------
  12x      12x     12x                     simplifique os 12x

8x = 6x + 9
8x - 6x = 9
2x = 9
x = 9/2