Răspuns :
a+b+c=100
a-x=16
a=16+x
b-x=21
b=21+x
c-x=36
c=36+x
inlocuim in suma numerele
16+x+21+x+36+x=100
73+3x=100
3x=100-73
3x=27
x=27:3
x=9
a=16+9=25
b=21+9=30
c=36+9=45
a-x=16
a=16+x
b-x=21
b=21+x
c-x=36
c=36+x
inlocuim in suma numerele
16+x+21+x+36+x=100
73+3x=100
3x=100-73
3x=27
x=27:3
x=9
a=16+9=25
b=21+9=30
c=36+9=45