A number, half of it, one seventh of it, all of it, add up to 33? Use the equation to solve, if you don't use the division point?

A number, half of it, one seventh of it, all of it, add up to 33? Use the equation to solve, if you don't use the division point?

Let this number be X
(1/2+1/7+1)x=33
23/14x=33
x=462/23
A: it's 462 / 23

A number, its two-thirds, one-half, one seventh, and its own sum is 37. What is the number,

Let this number be X
2/3X+1/2X+1/7X+X=194
97/42X=194
X=194÷97/42
X=194×42/97
X=84

Simple algorithm of 19 / 20 * 199 * 19 / 20

Original formula = (1-1 / 20) * (200-1) * (1-1 / 20)
=(1-1/20)^2*(200-1)
=(1+1/400-1/10)*(200-1)
=200+1/2-20-1-1/400+1/10
=180-1/2+1/10-1/400
=180-0.5+0.1-0.0025
=179.5975