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marius are in colectia sa 42 masinute . dan are de 7 ori mai putine , iar mihai de 3 ori mai multe decat dan . cate masinute au copiii?


Răspuns :

D = 42: 7 = 6 masinute are Dan
M = 6 x 3 = 18 masinute are Mihai

42+6+18 = 66 masinute au in total

1 cate masinute are Dan ?  
    42:7=6
2 cate masinute are Mihai ?
    6x3=18
3 cate masinute au impreuna ?
    42+6+18=66