Răspuns :
Răspuns:
[tex]a+b = 10\\\\b+c = 20\\\\a+c = 24\\\\a+b+b+c+a+c=10+20+24\\\\2a+2b+2c= 10+20+24\\\\2a+2b+2c=54\\\\a+b+c=54:2\\\\a+b+c=27\\\\[/tex]
Răspuns:
[tex]a+b = 10\\\\b+c = 20\\\\a+c = 24\\\\a+b+b+c+a+c=10+20+24\\\\2a+2b+2c= 10+20+24\\\\2a+2b+2c=54\\\\a+b+c=54:2\\\\a+b+c=27\\\\[/tex]