Question

Resolva as seguintes equaçoes fracionarias

a) $\frac{72-3x}{x} = 15$

b)$\frac{6}{x-8} = \frac{4}{x}$

c) $\frac{9-x}{3x+5} = \frac{1}{2}$

Answer 1

72-3x/x =15
72-3x=15x
72=18x
x=72/18= 36/9=4

b) 6/x-8=4/x

6x=4x-32
2x=-32
x= -16

c)9-x/3x+5=1/2
18-2x=3x+5
18-5 =5x
13=5x
x=13/5