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a+b+c= 1000 kg cartofi
a= b+71 kg
b= c minus 200 kg
a, b, c=?????
cu metoda figurativa {grafica}

Răspuns :

Cristianind
71
a/--------/------/
b/--------/ 200 }1000
c/--------/-----------/

Annamarria10
c=200+b
a=b+71
b+71+b+200+b=1000
3b+271=1000
3b=1000-271
3b= 729
b=729:3
b=243
a=243+71
a=314
c=243+200
c=443
Verificare:314+243+443=
557+443=1000

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