Question

resolva as equações fracionarias:
a)$\frac{20}{3x-1} =4$
b)$4+\frac{3}{x-2} =3$

Answer 1

a)

  20     =   4
3x - 1

20 = 4.(3x - 1)
20 = 12x - 4
20 + 4 = 12x
24 = 12x
12x = 24
x = 24/12
x = 2
=============================
b)

4 +     3    =   3
       x - 2

mmc = x - 2

4(x - 2) + 3 = 3(x - 2)
   x - 2             x - 2

4.(x - 2) + 3 = 3.(x - 2)
4x - 8 + 3 = 3x - 6
4x - 5 = 3x - 6
4x - 3x = - 6 + 5
x = - 1