Chapter 3, Problem 51PQ

The resultant vector $\stackrel{\to }{R}=2\stackrel{\to }{A}-\stackrel{\to }{B}-2\stackrel{\to }{C}$ has zero magnitude. Vector $\stackrel{\to }{A}$ has an x component of 4.60 m and a y component of –12.1 m. and vector $\stackrel{\to }{B}$ has an x component of –3.00 m and a y component of –4.00 m. What are the x and y components of vector $\stackrel{\to }{C}$? (All of these are two-dimensional vectors.)