Find the value of the expression for the given values of the variables (x-y) + (y-x) – (x + y); x = -5; y = 3.2

(x – y) + (y – x) – (x + y) – simplify the expression, then substitute for the variables x and y the values x = – 5, y = 3.2; expand the brackets: if there is a plus sign in front of the bracket or it costs nothing, then remove the bracket and the plus sign, and write each term from the bracket with the same sign with which it was written in the bracket; if there is a minus sign in front of the bracket, then we remove the bracket and the minus sign, and write each term from the bracket with the opposite sign;

x – y + y – x – x – y = (x – x – x) + (- y + y – y) = – x – y;

– (- 5) – 3.2 = 5 – 3.2 = 1.8

Answer. 1.8.