Răspuns :
a+b=25
(a+b) - (a-b) = 14
25-(a-b) = 14
a-b= 25-14
a-b=11
a=11+b
11+b+b=25
2b=25-11
2b=14
b=14:2
b=7
a=7+11
a=18
(a+b) - (a-b) = 14
25-(a-b) = 14
a-b= 25-14
a-b=11
a=11+b
11+b+b=25
2b=25-11
2b=14
b=14:2
b=7
a=7+11
a=18
(a+b)-(a-b)=14
25-(a-b)=14
a-b=25-14
a-b=11
a+b+a-b=25+11
2a=36
a=36:2
a=18
b=18-11=7
25-(a-b)=14
a-b=25-14
a-b=11
a+b+a-b=25+11
2a=36
a=36:2
a=18
b=18-11=7