Question

Ok I need pre-calc help please medal and fan.
if you have the time. multiple questions

Answer 1

correct

Answer 2

if you add 3r -s+t you move from the "head" of x to the tail of x, which is the same as -x
in other words
-x= 3r-s+t
and
x= -3r+s-t

Answer 3

thank you so much