Question

anca si diana au impreuna 90lei.anca si radu au impreuna79lei.iar diana si radu au impreuna97lei.cati lei are fiecare copil?

Answer 1

a+d=90
a+r=79
d+r=97
2(a+d+r)=90+79+97
a+d+r=266:2=133
90+r=133
r=43 lei
d+79=133
d=54 lei
a+97=133
a=36 lei

Answer 2

A+D=90
A+R=79
D+R=97

2R+2A+2D=90+97+79=>266
266:2=133
R+A+D=133

R+90=133
R=130-90
R=43

A+43=79
A=79-43
A=36

36+D=90
D=90-36
D=54



A+43=79