Question

Iulia are cu 39 mai multe alune decat Paul , iar Maria are cu 11 mai multe decat Paul. Impreuna au 1241 alune. Cate alune are fiecare?

Answer 1

Notam cu m=Maria, i=Iulia, p=Paul
m+p+i=1241
i=39+p
m=11+p

Inlocuim:
39+p+11+p+p=1241
50+3p=1241
3p=1191
p=397 alune
i=397+39=436
m=397+11=408

Iulia are 436 alune, Paul are 397 alune, Maria are 408 alune.

Answer 2

a+b+c=1241
a=39+b
c=11+b
inlocuim in primul ex
39+b+b+11+b=1241
50+3b=1241⇒3b=1241-50⇒b=1191÷3=397
b(PAUL)=397alune
a(IULIA)=39+297=436alune
c(MARIA)=11+397=408 alune