Răspunsuri

2014-11-16T17:28:05+02:00
Notez numarul cu x . 
(2x+15) : 3 = 17 
2x+15 = 51
2x = 36
x=18
1 4 1
2014-11-16T17:28:38+02:00
2x+15=y:3=17
y=17·3=51
2x+15=51
2x=51-15
2x=36
x=36/2
x=18
verificare
2·18+15=51:3=17
2 4 2