Giovanni justifies whether the expression -4x-8 is equivalent to -2(x+1)-2(x+3)by letting x=3 in both expressions. what is the value of each expression when x=3 3 and -20 4 and 4 -20 and -20 3 and 4

For this case we have the following expressions:
 -4x-8
 -2 (x + 1) -2 (x + 3)
 Evaluating x = 3 in both expressions we have:
 -4 (3) -8 = -12 - 8 = -20
 -2 (x + 1) -2 (x + 3) = -2 (3 + 1) -2 (3 + 3) = -2 (4) -2 (6) = -8-12 = -20
 
 the value of each expression when x = 3 is:
 -20 and -20