Răspuns :
ce cantitate de faina a ramas?
primul sac=28 kg
al doilea=28:2=14 kg
al treilea=28x2=56
653-(28+14+56)=555 s-a luat
555:3=185
ce cantitate a fost?
primul sac=185+28=213kg
al doilea=185+14=199kg
al treilea=185+56=241kg
primul sac=28 kg
al doilea=28:2=14 kg
al treilea=28x2=56
653-(28+14+56)=555 s-a luat
555:3=185
ce cantitate a fost?
primul sac=185+28=213kg
al doilea=185+14=199kg
al treilea=185+56=241kg
a+b+c=653
a-x=28
b-x=28:2
c-x=28•2
a=28+x
b=14+x
c=56+x
28+x+14+x+56+x=653
3x=653-98
3x=555
x=185
a=28+185=213
b=14+185=199
c=56+185=241
verificare:
213+199+241=653
a-x=28
b-x=28:2
c-x=28•2
a=28+x
b=14+x
c=56+x
28+x+14+x+56+x=653
3x=653-98
3x=555
x=185
a=28+185=213
b=14+185=199
c=56+185=241
verificare:
213+199+241=653