va rog
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Va Rog class=

Răspuns :

P=A×5
A+25=P-75
A=P-75-25
P=(P-75-25)×5
P=5P-375-125
375+125=5P-P
500=4P
P=500:4
P=125
P=A×5
A=125:5
A=25

Verificăm:
A+25=P-75
25+25=125-75
50=50