Răspuns :
nr 1 /__/
nr 2 /__/__/__/
nr 3 /__/__/__/__/__/
nr 1 + nr 2 + nr 3 = 9 × /__/ = 108
/__/ = 108 : 9 = 12
nr 1 = 12
nr 2 = 36
nr 3 = 60
a + b + c = 108
b = 3a
c = 5a
a + 3a + 5a = 108
9a = 108
a = 108 : 9
a = 12
b = 3 × 12 = 36
c = 5 × 12 = 60
60 + 36 + 12 = 96 + 12 = 108
nr 2 /__/__/__/
nr 3 /__/__/__/__/__/
nr 1 + nr 2 + nr 3 = 9 × /__/ = 108
/__/ = 108 : 9 = 12
nr 1 = 12
nr 2 = 36
nr 3 = 60
a + b + c = 108
b = 3a
c = 5a
a + 3a + 5a = 108
9a = 108
a = 108 : 9
a = 12
b = 3 × 12 = 36
c = 5 × 12 = 60
60 + 36 + 12 = 96 + 12 = 108
[tex]a + b + c = 108[/tex]
[tex]a = \frac{b}{3} [/tex]
[tex]b = 3a[/tex]
[tex]c = 5a[/tex]
[tex]a + 3a + 5a = 108[/tex]
[tex]9a = 108[/tex]
[tex]a = \frac{108}{9} [/tex]
[tex]a = 12[/tex]
[tex]b = 3 \times 12 = 36[/tex]
[tex]c = 5 \times 12 = 60[/tex]