Respuesta :
9( x - 5) = 18
9x -45 = 18
9x = 18 +45
x = 63/9
x = 7
comprobacion
9( 7-5) = 18
9*2 = 18
18 = 18
9x -45 = 18
9x = 18 +45
x = 63/9
x = 7
comprobacion
9( 7-5) = 18
9*2 = 18
18 = 18