Răspuns :
I ........|—|=16m ...................}
aII-a .|—|-5m=16-5=11m ...} 50m
aIII-a |—|+7m=16+7=23m }
Egalăm segmentele:
|—| .................}
|—|................. } 50m-7m+5m=48m
|—|=48:3=16m}
aII-a .|—|-5m=16-5=11m ...} 50m
aIII-a |—|+7m=16+7=23m }
Egalăm segmentele:
|—| .................}
|—|................. } 50m-7m+5m=48m
|—|=48:3=16m}
a+b+c=50 m
a=b+5 ⇒ b=a-5
a=c-7 ⇒ c=a+7
a+a-5+a+7=50
a+a+a=50-7+5
3a=48
a=48:3
a=16 m prima bucata
b=16-5
b=11 m a doua bucata
c=16+7
c=23 m a treia bucata
V: 16+11+23= 50 m
sau prin segmente
/-----/ a
/-----/-5 b
/-----/+7 c
Egalam segmentele .
3/-----/=50+5-7=48
1/-----/=48:3=16
a=16
b=16-5=11
c=16+7=23
a=b+5 ⇒ b=a-5
a=c-7 ⇒ c=a+7
a+a-5+a+7=50
a+a+a=50-7+5
3a=48
a=48:3
a=16 m prima bucata
b=16-5
b=11 m a doua bucata
c=16+7
c=23 m a treia bucata
V: 16+11+23= 50 m
sau prin segmente
/-----/ a
/-----/-5 b
/-----/+7 c
Egalam segmentele .
3/-----/=50+5-7=48
1/-----/=48:3=16
a=16
b=16-5=11
c=16+7=23