Calculer la valeur x

A = 6( x-1) + (x +8) x= 2

 

A = 2( 3x-1) + (x +4) x= 3

 

A = 6( -x -1) + (x - 7) x= 7

 

A = 6( 3x-1) + (3x - 8) x= 4

 

A = 6( x- 1) + (2x +8) x= 5