Respuesta :
'decreased by' means minus
'twice a number h' means 2 times a number, and that number is h, that means 2 times h or 2h
42 decreased by twice of h means 42-2h
'twice a number h' means 2 times a number, and that number is h, that means 2 times h or 2h
42 decreased by twice of h means 42-2h