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Calculeaza numerele care se ascund sub desenele Marei.Galeata+Mos+Umbrela=300.Galeata+Mos=200.Mos+Umbrela=175

Răspuns :

Galeata=x; Mos=y; Umbrela=z////'
x+y+z=300/ x+y=200/ y+z=175////
x=200-y, iar z=175-y/
200-y+y+175-y=300 ===>375-y=300====> y=75(Mos), x=125 (Galeata) si z=100(Umbrela)