Răspunsuri

2014-02-11T18:16:58+02:00
A=21
b=?
c=?
a+b+c=205
21+b+c=205

b+c=184
b:c=3 r 4
b=3c+4

3c+4+c=184
4c=180
c=180:4
c=45

b+45=184
b=139

2014-02-11T18:20:03+02:00
A+b+c=205
b:c=3 r4=>b=3c+4
21+3c+4+c=205
25+4c=205=>4c=180=>c=180:4=>c=45
b=3x45+4=>b=139