x=11
gata
da acum e bine
3x+3=5x-25,...3+25=5x-3x,,,,,,28=2x de unde x 28 :2=14
de unde verificare 3x14+3=5x14-25=45=45 si gata este pt nivelul de clasa 5

Răspunsuri

2014-04-25T09:42:27+03:00
2014-04-25T09:48:00+03:00
3x+3=5(x-5)=>
=>3x+3=5x-25=>
=>3x-5x=25-3=>
=>-2x=22=>
=>-x=22:2=>
=>-x=11
1 5 1