Răspuns :
a+b=36
a) a-b=b
a=2b
2b+b=36
3b=36
b=12
b) a+b=36
a-b=b/4
a= 5b/4
5b/4+b=36
11b=36/4
11b=9
b= 9/11
c)a+b=36
a-b=2b
a=3b
3b+b=36
4b=36
b=9
a) a-b=b
a=2b
2b+b=36
3b=36
b=12
b) a+b=36
a-b=b/4
a= 5b/4
5b/4+b=36
11b=36/4
11b=9
b= 9/11
c)a+b=36
a-b=2b
a=3b
3b+b=36
4b=36
b=9