Răspuns :
a+b=44
a-b=28⇒a=28+b
28+b+b=44
28+2b=44
2b=44-28
2b=16
b=16:2
b=8
a=28+8
a=36
V:36+8=44
a-b=28⇒a=28+b
28+b+b=44
28+2b=44
2b=44-28
2b=16
b=16:2
b=8
a=28+8
a=36
V:36+8=44
fie : a-1 nr
b-2 nr
a+b=44 a-b=28
a=44-b 44-b-b=28
a=44-b -2b=28-44
a=44-b -2b=-16
a=44-b b=8
a=36
b-2 nr
a+b=44 a-b=28
a=44-b 44-b-b=28
a=44-b -2b=28-44
a=44-b -2b=-16
a=44-b b=8
a=36