Răspuns :
a+b=35
a/b=3/4⇒4a=3b⇒a=3b/4
3b/4+b=35
(3b+4b)/4=35
7b=35·4
7b=140
b=140/7
b=20
a=35-b
a=35-20
a=15
a/b=3/4⇒4a=3b⇒a=3b/4
3b/4+b=35
(3b+4b)/4=35
7b=35·4
7b=140
b=140/7
b=20
a=35-b
a=35-20
a=15