Question

Luca are de 4 ori mai multi bani decat andrei matei are de 3 ori mai putin decat luca cei 3 au inpreuna 76 lei cati lei are andrei ?

Answer 1

l=4a
m=4a:3
4a+a+4a:3=76/x3
12a+4a+4a=228
a=228:19
a=12
l=12x4=48
m=48:3=16

Answer 2

x+y+z=76
x =4y
z =x/3 ;  z =4y /3  inlocuim pe  x  si  z  in prima relatie
4y  =y  =4y /3 =76
12y +3y +4y =228
19y =228
y =12
x =4y
x =4*12 =48
z =48/3
z =16
 ( V  :    48+12+16 =76 )