Question

Bianca,Denisa si Silvia au impreuna 160 lei.Ce suma are fiecare daca Bianca arecu 20 mai multdecat Silvia,iar Denisa are cat Bianca si Silvia la un loc.

Answer 1

B=Bianca
D=Denisa
S=Silvia
B+D+S=160 lei
B=S+20
D=B+S=2S+20
B+D+S=S+20+2S+20+S
160=4S+40
4S=120
S=30 lei (Silvia)
B=30+20
B=50 lei (Bianca)
D=60+20
D=80 lei (Denisa)

Answer 2

B.I_____I+20
D.I_____I_____I+20
S.I_____I

Suma este 160 .
160-40=120 ( suma partilor egale )
120:4=30 ( Silvia )
30+20=50 ( Bianca )
30x2+20=80 ( Denisa )