Question

CORINA SI MARIA AU IMPREUNA 160 DE ABTIBILDURI,MARIA SI IRINA AU IMPREUNA 134 DE ABTIBILDURI,IAR CORINA SI IRINA AU IMPREUNA 146 DE ABTIBILDURI.CATE ABTIBILDURI ARE FIECARE FETITA?

Answer 1

Corina + Maria = 160      Corina-c
Maria+Irina=134              Maria-m
Corina+Irina=146            Irina-i

c+m+m+i+c+i=160+134+146
2c+2m+2i=428
c+m+i=428:2=214
 Corina+Maria+Irina = 214 abtibilduri
corina+Maria=160
 214-160=54 abtibilduri are Irina
Maria + Irina=134
214-134=80 abtibilduri are Corina
Corina+Irina=146
214-134=68 abtibilduri are Maria

Coronita :)?

Answer 2

c+m=160=>c=160-m
m+i=134=>i=134-m
c+i=146
c+m+m+i+c+i=190+134+146
2c+2m+2i=470
2(160-m)+2m+2(134-m)=470
320-2m+2m+268-2m=470
-2m+2m-2m=470-320-260
-2m=-110
m=-110:(-2)
m=55
c=160-m=160-55=>m=105
i=134-m=134-55=>i=79
coroana?