Răspuns :
|______________| latimea
|______________|___________|-----| 2xlatimea+18=lungimea
notam cu x latimea(un segment)
x+2x+18=420
3x=420-18
3x=402
x=134(latimea)
L=2x+18
L=2X134+18
L=286 m
|______________|___________|-----| 2xlatimea+18=lungimea
notam cu x latimea(un segment)
x+2x+18=420
3x=420-18
3x=402
x=134(latimea)
L=2x+18
L=2X134+18
L=286 m