Question

Determina valoarea lui a:

27:[26+(6хa-7х3):9]+(13-2х2х3)=2

Answer 1

27 : [ 26 + ( 6 x a - 7 x3 ) : 9 ] + ( 13 - 2 x 2 x3 ) = 2
27 : [ 26 + ( 6 x a - 21 ) : 9 ] + ( 13 - 12 ) = 2
27 : [ 26 + ( 6 x a - 21 ) : 9 + 1= 2
27 : [ 26 + ( 6 xa - 21 ) : 9 = 2 - 1
27 : [ 26 + ( 6 x a - 21 ) : 9 = 1
27 : [ 26 + ( 6 x a - 21 ) = 9
26 + ( 6 x a - 21 ) = 27 : 9
26 + ( 6 x a - 21 ) = 3
6 x a - 21 = 26- 3
6 x a - 21 = 23
6 x a = 23 + 21
6 x a = 44
a = 44 : 6
a = 7 , 33