Question

rozwiąż równania ; 14.005x+0,2+20,85

20-17 4/15x=13 1/8

Answer 1

zad 1

14,005x+0,2+20,85=0

14,005x = -20,85-0,2

14,005x = -21,05    /: 14,005

x = - 1,503...

 

inaczej

 

x = -21,05:14,005

x = -21 5/100 : 14 5/1000 = -2105/100 * 1000/14005 = skarcamy= -21050/14005

x = - 1   7045/14005

x = - 1 1409/2801

 

 

zad 2

 

20-17 4/15x=13 1/8

-17 4/15x = 13 1/8 - 20

- 259/15x = 6  7/8 = 55/8           /*(-15/259)

x = - 825/2072