Răspuns :
Răspuns:
f-varsta ficei
m-varsta mamei
t-varsta tatalui
f=m/2-4⇒ f=(t-2)/2-4
m=t-2
(m+t):f=5 rest 2
(t-2+t):[(t-2)/2-4]=5 rest 2
(t-2+t)=[(t-2)/2-4]*5+2
(t-2+t)=[(t-2)*5/2-20]+2
2t-2=[5t-10/2-20]+2
2t=5t-10/2-20+4
2t=5t-10/2-16
4t=5t-10-32
t=42
m=t-2
m=42-2
m=40
f=m/2-4
f=40/2-4
f=20-4
f=16
Verificare:
(m+t):f=5 rest 2
(40+42):16=5 rest 2
82:16=5 rest 2 Adevarat
Varsta Andreei este de 16 ani.
Răspuns:
notam cu f varsta ficei.
notam cu m varsta mamei.
notam cu t varsta tatalui.
f=m/2-4⇒ f=(t-2)/2-4
m=t-2
(m+t):f=5 rest 2
(t-2+t):[(t-2)/2-4]=5 rest 2
(t-2+t)=[(t-2)/2-4]*5+2
(t-2+t)=[(t-2)*5/2-20]+2
2t-2=[5t-10/2-20]+2
2t=5t-10/2-20+4
2t=5t-10/2-16
4t=5t-10-32
t=42
m=t-2
m=42-2
m=40
f=m/2-4
f=40/2-4
f=20-4
f=16