Question

Rozwiąż: 2x-1/x-10 = 3/5

2/x = 7/21

Answer 1

 

a)

2x-1/x-10 = 3/5       dla     x-10 ≠0 czyli  x ≠ 10

3*(x-10) =5* (2x-1)

3x -30 = 10x -5

3x-10x = -5 +30

-7x = 25  / (-7)

x = - 25/7

x= - 3 i 4/7

b)
2/x = 7/21  dla  x≠0

7x=2*21

7x = 42   /:7

x = 6