Răspuns:
Explicație pas cu pas:
9/9 - a = 7/9
a = 9/9 - 7/9
a = 2/9
V: 9/9 - 2/9 = ( 9 - 2 ) / 9 = 7/9
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8/8 - b = 2/8
b = 8/8 - 2/8
b = ( 8 - 2 ) / 8
b = 6/8
V: 8/8 - 6/8 = 2/8
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c - 3/6 = 2/6
c = 2/6 + 3/6
c = ( 2 + 3) /6
c = 5/6
V: 5/6 - 3/6 = 2/6