The common denominator would be 40
From general equation of a line;
y=mx+c
m=

m=

m=-1
y=-x+c
Finding value of c;
using point (-2,0)
0=-(-2)+c
c=-2
y=-x-2
1+1+1+1+1+5+5+5+5 is one
5+5+5+1+1+1+1+1+1+1+1+1+1 is another
5+5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is three
5+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 is four.
There are 4 combinations.
True the skeletal system shapes the body, like your shoulders and chest.