Question

cum se rezolva exercitiul a+b+c=361, stiind ca b=a+15 si c=b+31 prin metoda grafica

Answer 1

a |---a---|
b |---a---|..15..|              }361
c |---a---|..15..|...31...|

Le adunam 
a+a+15+a+15+31 = 361
3a+61 = 361
3a=361-61
3a=300
a=100

b=100+15=115
c=115+31 = 146

Answer 2

a+b+c =361
b=a+15
c=b+31=a+15+31
a+a+15+a+15+31=361
a ___
b ___+15
c ___+15+31        =361
361=3 sg egale +15+15+31=30+31=61
3 sg egale=361-61=300
1 sg =300:3=100=a
b=100+15=115
c=115+31=146
verificare=100+115+146=215+146=361