Question

27:[26+(6xa-7x3):9]+(13-2x2x3)=2 Va rog chiar am nevoie de ajutor rezolvati-l

Answer 1

Răspuns:

27:[26+(6a-21)/9]+1=2

27:(234+6a-21)/9=1

27•9=213+6a

243=213+6a

6a=30

a=5

Answer 2

Răspuns:

Explicație pas cu pas:

27 : [26 + ( 6 x a - 7 x 3 ) : 9 ] + ( 13 - 2 x 2 x 3 ) = 2

27 : [ 26 + ( 6 x a - 21 ) : 9 ] + ( 13 - 12 ) = 2

27 : [ 26 + ( 6 x a - 21 ) : 9 ] + 1 = 2

27 : [ 26 + ( 6 x a - 21 ) : 9 ] = 2 - 1

26 + ( 6 x a - 21 ) : 9 = 27 : 1

26 + ( 6 x a - 21 ) : 9 = 27

( 6 x a - 21 ) : 9 = 27 - 26

( 6 x a - 21 ) : 9 = 1

6 x a - 21 = 1 x 9

6 x a = 9 + 21

6 x a = 30

a = 30 : 6

a = 5 → numarul, aflat prin metoda mersului invers