Question

3. Suma a două numere consecutive este 999
Aflaţi numerele.
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Answer 1

Explicație pas cu pas:

Fie a - primul numar

a + 1  - al doilea numar

$\displaystyle\fb \it a+a+1 = 999\\\\2a+1=999\\\\2a=999-1\\\\2a=998\\\\a=998:2\\\\\boxed{\it a= 499}\: primul\:numar \\\\ \boxed {\it 500}\:al\: doilea\: numar$

Raspuns:

499 - primul numar

500 - al doilea numar

Answer 2

Fie a,b-doua numere consecutive

a+b=999

b=a+1

a+a+1=999

2a+1=999

2a=999-1

2a=998

a=998:2

a=499

b=499+1

b=500