Răspunsuri

2014-06-08T08:42:26+03:00
A+b=195
a+75=b+40
75-40=b-a
35=b-a
b-a=35
b=35+a

a+35+a=195
2a=195-35
2a=160
a=160:2
a=80


b=35+80
b=115