Răspunsuri

2014-10-02T17:37:20+03:00
B=40+3*n
b+n=68
40+3*n+n=68
4*n=28
n=28/4=7
b=40+3*7=40+21=61
2014-10-02T17:37:51+03:00
B=3n+40
n+b=68
n+3n+40=68
4n=68-40
4n=28
n=28:4
n=7 ani nepotul

b=7*3+40
n=21+40
b=61 ani bunica