Question

Ana Maria si Cristina au impreuna 300 lei Ana si Maria au impreuna 220 lei iar Maria si Cristina au impreuna 180 lei.Cati lei au fiecare?​

Answer 1

a+b+c=300

a+b=220

b+c=180

220+c=300 /-

c=80

b+80=180 / -

b=100

a+100=220 /-

a=120

a=Ana

b=Maria

c=Cristina

Answer 2

Răspuns:

a+m+c=300

a+m=220

220+c=300=>c=300-220=80 lei are Cristina

m+c=180

a+180=300=>a=300-180=120 lei are Ana

120+m=220=>m=220-120=>100 lei are Maria