Answer:
RS
Step-by-step explanation:
This is very similar to the previous question i answered. You can tell what sides are similar on a shape by counting how many marks they have. For example, side EF and RS have 2 marks on their sides which means they are similar.
3(x-2)= -3
Divide both sides by 3
x-2 = -1
add 2 to both sides
x - 2 +2 = -1 + 2
x = 1
-18