Just some math :> and meh needs halp

Which shows the image of rectangle abcd after the rotation (x, y) → (–y, x)?

Which is the most efficient first step to solve x in the equation 3.7x - 18 = -4.3x -34 a. add 3.7x to both sides of the equation. b. add 4.3x to both sides of the equation. c. subtract 18 from both sides of the equation. d. subtract 34 from both sides of the equation.

Someone me what is the area of this figure? 18m 18m 8m 16m