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dau coroana!!!!!!!!!!!!!:):):):)

Dau Coroana class=

Răspuns :

a+b+c+d=392
a+b=240 => a=240-b
12+c=d => c=d-12
4+b=d =>b=d-4
240+d-12+d=392
228+2d=392/-228
2d=164/÷2
d=82
c=82-12
c=70
b=82-4
b=78
a=240-78
a=162