Răspuns:
a+b+c=986
[tex]b = a + 2[/tex]
[tex]b = \frac{c}{2} [/tex]
a+a+2+c=986
2a=984-c
[tex]a = \frac{984 - c}{2} [/tex]
[tex] \frac{984 - c}{2} + \frac{c}{2} + c = 986[/tex]
aici aducem la același numitor
984-c+c+2c=1 972
2c=988
c=494
b=494:2=247
a=
[tex]a = \frac{984 - 494}{2} [/tex]
a=490:2=245
