Question

dudu si ioana au impreuna 90 alune.cate alune are fiecare daca ioana are de 8 ori mai multe decat dudu|
va rogg repede este urgent

Answer 1

pai I are de 8 ori mai multe decat D
I=8D
I+D=90
8D+D=90
9D=90
Dudu are 10 Ioana are 80 

Answer 2

8x+x=90
9x=90
x=90:9
x=10
Dudu are 10
Ioana are 80