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2013-10-09T20:09:35+02:00
 \frac{11x}{3} = \frac{22}{9} 


11x= 22/9*3
11x=66/9
11x=22/3
x=22/3*1/11
x=2/3

 \frac{4}{13} x= \frac{6}{26}
x= 6/26*13/4
x= 3/13*13/4
x= 3/4

9x/2= 3/6
9x = 3/6*2
9x= 6/6
x= 1/9