Răspunsuri

2014-11-13T16:25:09+02:00
(a*c) *c=155*c
a*(b*c)=(a*b)+(a*c)
           =6a+155
c*(a+b)=(a*c)+(c*b)
          =155+6c
b*(c*a)=b*155=155*b
avem a x c = 155 deci calculm : 155 : a = c avem 155 : 5 = 31 rezulta a = 5 si c = 31
( a x b ) x c = ( 5 x 6 ) x 31 = 30 x 31 = 930
a x ( b x c ) = 5 x ( 6 x 31 ) = 5 x 186 = 930
c x ( a x b ) = 31 x ( 5 x 6 ) = 31 x 30 = 930
b x ( c x a ) = 6 x ( 31 x 5 ) = 6 x 155 = 930