Răspuns :
d- diferenta
s- suma
d=390
390=5s/8
5s=3120
s=624
a+b=624
a-b=390 => a=390+b
390+b+b=624
2xb=624-390
2xb=234
b=117
a=390+117
a=507
Vf:
507+117=624?
624=624 ADEVARAT
507-117=390?
390=390 ADEVARAT
s- suma
d=390
390=5s/8
5s=3120
s=624
a+b=624
a-b=390 => a=390+b
390+b+b=624
2xb=624-390
2xb=234
b=117
a=390+117
a=507
Vf:
507+117=624?
624=624 ADEVARAT
507-117=390?
390=390 ADEVARAT
Fie x numarul mic
Numarul mare este x+390
[tex]390=\dfrac58(x+x+390)[/tex]
[tex]2x+390=\dfrac{390\cdot8}{5} [/tex]
[tex]2x=604-390[/tex]
x=117 (numarul mic)
117+390=507 (numarul mare)
Poti face si verificarea sa constati ca este corect.
Numarul mare este x+390
[tex]390=\dfrac58(x+x+390)[/tex]
[tex]2x+390=\dfrac{390\cdot8}{5} [/tex]
[tex]2x=604-390[/tex]
x=117 (numarul mic)
117+390=507 (numarul mare)
Poti face si verificarea sa constati ca este corect.