Question

in trei cutii au fost puse 90 de cuburi.in a doua cutie sunt de doua ori mai multe decat in prima cutie iar in a treia cutie de trei ori mai multe cuburi decat in a doua.cate cuburi se afla in fiecare cutie.

Answer 1

a+b+c=90
b=2a
c=3b=>c=6a
a+2a+6a=90
9a=90
a=90:9=>a=10 cuburi in prima cutie
b=2x10=20 cuburi in a2a cutie
c=6x10=60 cuburi in a3a cutie

Answer 2

a+b+c=90
b=2a
c=3b
=>c=6a
a+2a+6a=90
9a=90
1)90:9=10 (cuburi in prima cutie)
2)2x10=20 (cuburi in cutia2
3)6x10=60 (cuburi in cutia3)