5subtracted from three times any number.
use x to represent any number,

3x - 5

Step-by-step explanation:

If x is used to represent the number

3 times the number is 3x

5 subtracted from it implies (-5)

hence the solution is 3x - 5

robert puts 2 in each row

geometry: triangles

solvers

lessons

answers archive

call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584