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2013-05-26T18:23:56+02:00

x/7=7/6

6x=7*7

x=49/6

 

x/11=-2/13

13x=-22

x=-22/13

 

x/-8=8/9

9x=-64

x=-64/9

 

-x/12=7/3

-3x=7*12

x=-84/3

 

7x/2=1/4

28x=2

x=2/28=1/14

 

2x/9=-7/27

2x*27=-7*9

54x=63

x=63/54

 

-11/9 x=-1/9

-11x*9=-9

-99x=-9

x=9/99=1/11