Răspunsuri

2014-02-06T14:05:14+02:00
A(b+c)-ad=a(b+c-d)
a=5, b+c-d=9            =>5*9=45
1 5 1
2014-02-06T14:18:52+02:00
a=5 
b +c-d=9=> b+c=9+d
Inlocuim aceste doua relatii in relatia pe care avem de aflat=>
a(b+c)-ad=
=5(9+d)-5d=
=45+5d-5d=
=45