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b-c=2,(6)
/=fractie,supra
a(b-c)=8/3
ax2,(6)=8/3
ax2intregi si6/9=8/3
ax24/9=8/3
ax8/3=8/3
a=8/3:8/3
a=1
→ il dau factor comun pe a
a×(b-c) =8/3
a× 24/9 = 8/3
a = 8/3 : 24/9
a=8/3 × 9/24→ l-am simplficat pe 8 cu 24=1/3; dar si 9 cu 3=3
a=3/3
a=1