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REZOLVATI ECUATLE CLASA A 6-A (DAU CORONITA)
a)7 ori X-8=13
b)3/4-5/6 ori X=1/4
c)2/5 ori X-1/2=1/10
d)1/8+1/2 ori (2X-1)=2X-1/8 ori (8X-1)-1/4 ori (4X-2)