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a fost răspuns

2/19+7/19-a=13/19;a-(16/25+7/25)=1/5,;2/24=16/24-a+2/24=16//24 ;6/19+12/19-a=9/19

Răspuns :

Capsunica35
2/19+7/19-a=13/19
9/19-a=13/19
-a=13/19-9/19
a=-4/19

a-(16/25+7/25)=1/5
a-23/25=1/5
a=1/5+23/25
a=5/25+23/25
a=28/25

2/24=16/24-a+2/24
a=18/24-2/24
a=16/24
a=4/6
a=2/3

6/19+12/19-a=9/19
-a=9/19-19/19
-a=-10/19
a=10/19

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