Question

aflati doua numere cu suma 30 stiind ca sunt direct proportionale cu 4si 6

Answer 1

a+b=30
a=4k
b=6k
4k+6k=30=>10k=30=>k=30:10=>k=3
a=4x3=12
b=6x3=18

Answer 2

Notez cu x şi y-numerele. x/4=y/6=>x=4y/6 4y/6+y=30 4y+6y=180 10y=180 I:10 y=18 =>x=12