Daca a+b=325
c+d=137
a)a+b+c+d=???
b)a+b-c-d=???
Ajutor!!


Răspuns :

a+b=325
c+d=137

a) a + b + c + d = 325 + 137 = 462
b) a + b - c - d = 325 - 137 = 188
a) a+b+c+d=325+137=462
b)a+b-c-d=325-c-d
c+d=137 rezulta c=137-d
a+b-c-d=325-137-d-d=
=188-2d