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Mihaboss11
a fost răspuns

niste muncitori au sapat 2km in 3 zile ...Stiind ca in primile 2 zile au sapat 1400 m, iar in ultimile doua 1200,afla cati m au sapat in fiecare zi

Răspuns :

Andreea2008M

2km=2000 m in 3 zile


1 si 2 zi au sapat 1400m ⇒ 3 zi au sapat 2000m-1400m=600m

3zi = 600m


2zi + 3zi=1200m ⇒ 2zi+600m=1200m ⇒ 2zi =1200-600m=600m

2zi=600m


1zi+2zi=1400m ⇒ 1zi+600m=1400m ⇒ 1zi= 1400-600m=800m

1zi=800m

BogoRogo1
a+b+c=2000
a+b=1400
b+c=1200
a+2b+c=2600
a+b+c=2000
b=600
a=800
c=600

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