Răspuns :
[tex]\dfrac54:x=\dfrac68\Rightarrow x=\dfrac54:\dfrac68=\dfrac54\cdot\dfrac86=\dfrac53[/tex]
5*1/4*1/2x=6/8
5/8x=3/4
8x=5*4 supra 3
8x=20/3
X=20/3 supra 8
X=20/3*1/8
X=5/6