Răspuns :
a-primul numar
b-al doilea numar
c-al treilea numar
(a+b+c)/3=17 => a+b+c=51; a+b+15=51;
a+b=36; b=36-a
c=15
2a+3=b; 2a+3=36-a; 2a+a=36-3; 3a=33; a=11
b=36-a; b= 36-11; b=25
b-al doilea numar
c-al treilea numar
(a+b+c)/3=17 => a+b+c=51; a+b+15=51;
a+b=36; b=36-a
c=15
2a+3=b; 2a+3=36-a; 2a+a=36-3; 3a=33; a=11
b=36-a; b= 36-11; b=25
a + b + c = 17
3
a + b + c = 51
c = 15
2a + 3 = b
a + 2a + 3 + 15 = 51
3a = 51 - 18
a = 33 : 3
a = 11
b = 2 * 11 + 3
b = 25
verificare: 11 + 25 + 15 = 51
3
a + b + c = 51
c = 15
2a + 3 = b
a + 2a + 3 + 15 = 51
3a = 51 - 18
a = 33 : 3
a = 11
b = 2 * 11 + 3
b = 25
verificare: 11 + 25 + 15 = 51