Răspunsuri

2014-04-15T20:45:54+03:00
X-Andrei
y-Maria
z-Mihai
x+y+z=22
2x=y  x=y/2
z+3=y  z=y-3

y/2 +y-3+y=22 aducem la acelasi numitor
y+2y-6+2y=44
5y=44+6
5y=50
y=10     z=10-3=7   x=10/2=5

  • Utilizator Brainly
2014-04-15T20:58:19+03:00
Andrei   I_____I+3
Maria     I_____I+3I_____I+3
Mihai     I_____I+3I_____I

Suma este 22 .
3+3+3= 9 ( suma partilor cunoscute )
22-12= 10 ( suma partilor egale )
10:5=2 ( o parte )
2+3=5 ( Andrei )
2x2+6=10 ( Maria )
2x2+3=7 ( Mihai )

Verificare : 5+10+7=22