CPM Homework Help : GC Problem 7-58

Point $M$ is the midpoint of $\overline{AB}$ and $B$ is the midpoint of $\overline{AC}$ . What are the values of $x$ and $y$ ? Show all work and reasoning.

Hint:

How do $AM$ and $MB$ relate to each other if $M$ is the midpoint? How can you use this to solve for $x$ ?

More Help:

Once you have found $x$ , use a similar method to find $y$ .

A line with points A, M, B, and C. Line A, M is labeled 4, x, minus 1. Line M, B, is labeled, x + 8. Line B, C, is labeled, 5 y + 2.