Răspuns :
a+b+c=81
a =a
b= 2xa
c= 3xb ( 3x 2xa )
a+2a+3x2a =81
a+2a+6a =81
9a =81
a= 81:9= 9
b=9x2 = 18
c= 18 x 3 =54
a =a
b= 2xa
c= 3xb ( 3x 2xa )
a+2a+3x2a =81
a+2a+6a =81
9a =81
a= 81:9= 9
b=9x2 = 18
c= 18 x 3 =54