Question

1. Daca ab-ac=285;a=57 determinati b-c
2.Andreea, Maria si Elena au impreuna 508 lei. Andreea are cu 19 lei mai mult decat Maria, iar Maria are cu 57 lei mai mult decat Elena.Ce suma de bani are fiecare?
3. Determinati nr natural X (2x-1)/(divide) 25 ; b) x+2/(divide)x-4

Answer 1

1.a(b-c)=285
b-c=285:57
b-c=5

2.A+M+E=508
A=M+19
M=E+57=>E=M-57
M+19+M+M-57=508
3M=508+38
3M=546
M=182
A=201
E=125