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11. Afla nr necunoscut:
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11 Afla Nr Necunoscut class=

Răspuns :

Adrianbadalan56

Răspuns:

a+3/7=5/7=>a=3/7+5/7=8/7

a-1/3=2/3=>a=2/3+1/3=3/3=1

2/9+a=8/9=>a=8/9-2/9=6/9=2/3

a+2/6=6/6=>a=6/6-2/6=4/6=2/3

samd

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