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Completati casetele: 2/? - 2/15 = 8/15​

Răspuns :

Răspuns:

2/x - 2/15 = 8/15​

2/x =8/15+2/15

2/x = 10/15

2/x=10/15

10x=2·15=>x=30:10=>x=3

2/a - 2/15 = 8/15

a = 8/15 - 2/15

a = 10/15 => 2/3 ( am simplificat cu 5 )

deci x = 3