it's super easy 19!
19 x 1 = 19
19 is a prime number. only 1 x 19 and 19 x 1 will equal 19
1
1 x 38, 2 x 19, 19 x 2, 38 x 1
x = -1.
1 + x + 2x = 20 So 1 + 3x = 20 so that 3x = 19 then x = 19/3 or 61/3
-1/19=x
1 x 95, 5 x 19.
0.1% * 19% = 0.19%
1 x 57, 3 x 19.
1 x 209, 11 x 19.
95 x 1 19 x 5