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X-{2/3}-{5/6}={1/2} Aflati X. dau coronita!

Răspuns :

x-2/3-5/6=1/2
x-4/6-5/6=3/6
x-4/6=5/6+3/6
x-4/6=8/6
x=8/6+4/6
x=12/6
x=2

x-(2/3-5/6)=1/2
se aduc la acelasi numitor:
x-4/6-5/6=3/6
x-4/6=3/6+5/6
x-4/6=8/6
x=8/6+4/6
x=12/6
x=2