Question

a+b+c=713 a=2b c=2a+13 a=? b=? c=?

Answer 1

   
[tex]\displaystyle\\ \texttt{|--------|--------|} ~~a\\ \texttt{|--------|} ~~b\\ \texttt{|--------|--------|--------|--------|}\underbrace{\texttt{-----|}}_{13} ~~c\\\\ \text{Daca scadem 13 din (a+b+c), ramanem cu 7 segmente egale cu b.}\\\\ 713 - 13 = 700\\ b = 700:7=\boxed{100}\\ a = 2b = 2\times 100 = \boxed{200}\\ c=2a+13=2\times 200 + 13 = 400+13=\boxed{413}\\\\ \texttt{Verificare:}\\\\ a+b+c=200+100+413 = \bf 713 [/tex]

Answer 2

a+b+c=713
a=2b
c=2a+13 => c=4b+13

2b+b+4b+13=713
7b+13=713
7b=713-13
7b=700
b=700:7 => b=100

a=2×100 => a=200

c=4×100+13 => c=413

Numerele sunt : 200 ; 100 ; 413