Question

Suma de 850 lei se imparte la 3 persoane . Primele doua persoane primesc 655 lei , iar ultimele doua primesc 540,5 lei . Cati lei primeste fiecare persoana ?

Answer 1

a+b+c=850 lei 
a+b= 655 
b+c=540.5 
-------------------(+)
a + b + b + c = 655 + 540,5
850 + b =1195,5
b=1195,5 - 850 = 345,5
a=655 - 345,5 = 309,5
c=540,5 - 345,5 = 195
   
   

Answer 2

$a+b+c=850\\a+b=655\\b+c=540,5\\a+b+b+c=655+540,5\\850+b=1195,5\\b=1195,5-850=345,5\\a=655-345,5=309,5\\c=540,5-345,5=195\\Verificare:309,5+345,5+195=850$