Răspuns :
[ 6 + ( m - 6 ) x 4 ] : 2 = 7
6 + ( m - 6 ) x 4 = 7 x 2
6 + ( m - 6 ) x 4 = 14
( m - 6 ) x 4 = 14 - 6
( m - 6 ) x 4 = 8
m - 6 = 8 : 4
m = 2 + 6
m = 8
Verific [ 6 + ( 8 - 6 ) x 4 ] : 2 =( 6 + 2 x 4) : 2 = 14 : 2 = 7
6 + ( m - 6 ) x 4 = 7 x 2
6 + ( m - 6 ) x 4 = 14
( m - 6 ) x 4 = 14 - 6
( m - 6 ) x 4 = 8
m - 6 = 8 : 4
m = 2 + 6
m = 8
Verific [ 6 + ( 8 - 6 ) x 4 ] : 2 =( 6 + 2 x 4) : 2 = 14 : 2 = 7