Răspunsuri

2014-04-30T07:13:00+03:00
Daca x=7, il inlocuim in 2x-3y=5 si avem

2*7-3y=5⇒14-3y=5⇒-3y=-9(inmultim cu -1)⇒3y=9(simplificam 3cu 9)⇒y=3
1 2 1
2014-04-30T07:50:45+03:00
2x7-3y=5       14-3y=5     3y=14-5    3y=9    y=9:3   deci  y=3
2x7-3x3=5