Răspuns :
a+b=849
a-b=575
a+b+a-b=849+575
2a=1424
a=1424:2
a=712
712+b=849
b=849-712
b=137
proba
712+137=849
712-137=575
a-b=575
a+b+a-b=849+575
2a=1424
a=1424:2
a=712
712+b=849
b=849-712
b=137
proba
712+137=849
712-137=575
a/----/+575
b/----/ }849
849-575=274(egalarea) 274:2=137(b)
137+575=712(a)
b/----/ }849
849-575=274(egalarea) 274:2=137(b)
137+575=712(a)