Question

0,5*(1,6x-6,4y)-2,4*(1,5x+y)

Answer 1

$boxed{0,5*(1,6x-6,4y)-2,4*(1,5x+y)}\\\ 0,8x-3,2y-3,6x-2,4y\\not0,not 8x-3,2y-not 3,not 6x-2,4y\\ -2,8x-5,6y\\\ boxed{boldsymbol{OTBET:-2,8x-5,6y}}$