Question

albert si carol au 168 de lei . robi cu carol au impreuna 108 lei iar robi cu albert au 300 lei . cati bani au copiii????

Answer 1

albert=a
carol=c
robi=r
a+c=168=>a=168-c
r+c=108=>r=108-c
r+a=300=>(108-c)+(168-c)=300=>-2c+276=300=>c=12
a=168-c=>a=156
r=108-c=>r=96

Answer 2

a=Albert
b=Carol
c=Robi
a+b=168 
b+c=108
c+a=300
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2a+2b+2c=476
2x(a+b+c)=476:2
a+b+c=238