Question 1122496
Formula for internal division

P={[(mx2+nx1)/(m+n)],[(my2+ny1)/(m+n)]}
where x1 y1 & x2y2 are the two points and x y is thepoint which divides in the ratio of m:n

57/8 = (4*8 +5*x)/5+8

57/8 = (4*8 +5*x)/13

13*57/8 = 32 +5x

5x = 60.625
x=12.125 = 97/8

-3 = (2*8+5y)/13
-39 = 16+5y

-55= 5y
y= -11

*[illustration internal_division.png].