Question

un automobil a parcurs 769.000 m in 3 zile.Stiind ca in primele doua zile a parcurs 5.160.000dm,iar in ultimele 2 zile 6.200hm,afla cati km a parcurs in fiecare zi.
URGENT!!!VA ROG!!DAU COROANA!SI 25 PUNCTE!

Answer 1

769 km in 3 zile

a+b+c=769 km

a+b=516 km

b+c=620 km ⇒ b = 620--c

a = 516 - b = 516 - 620 + c = c - 104

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516 - 620 + c + 620 - c + c = 769

516+c=769

c=769-516=253 km a 3-a zi

b=620-257=363 km a 2-a zi

a=257-104=153 km prima zi

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Verificare: a+b+c= 253+363+153 = 769 km, corect,

a+b=153+363=516, corect.