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3 years ago

Suma doua numere este 702.Diferenta lor este un sfert din scazator .Afla cele doua numere dAU COROANA

Mathematics

1 answer:

Molodets [167]3 years ago

8 0

Answer:

Cele două numere căutate sunt:

390
312

Step-by-step explanation:

Pentru a rezolva necunoscutul cu aceste două numere, trebuie create două ecuații cu două necunoscute X și Y cu informațiile obținute: În primul rând, știm că suma celor două numere este egală cu 702, prin urmare:

1. X + Y = 702

Apoi se menționează că diferența (adică scăderea) dintre cele două numere este egală cu un sfert din numărul cel mai mic, pentru a avea o referință, vom identifica variabila Y ca fiind cel mai mic număr, deci a doua ecuație ar fi:

2. X - Y = 0,25Y sau Y / 4

Ștergem variabila X în a doua ecuație:

X - Y = 0,25Y
X = 0,25Y + Y
X = 1,25Y

Ecuația 1 este acum folosită cu X-ul șters:

X + Y = 702
1,25Y + Y = 702
2,25Y = 702
Y = 702 / 2,25
Y = 312

Acum, din moment ce se știe că este X = 1.25Y, valoarea lui Y este înlocuită și obținem:

X = 1,25Y
X = 1,25 * 312
X = 390

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