Răspunsuri

2014-05-06T13:51:32+03:00
A-b=5 (a+b)-(a-b)= a+b-a+b rezulta 2b=40 |:2 b = 20 a =20+5 a=25

2 2 2
2014-05-06T13:51:33+03:00
S- suma
d- diferenta

d=5
s-d=40
s-5=40
s=40+5=> s=45

a-b=5=> a=5+b
a+b=45
5+b+b=45
5+2b=45
2b=45-5
2b=40
b=40:2=> b=20

a=5+b=> a=20+5
a=25
4 2 4