Math equation help please?

-x/3 - 5 = 2x
=>-x - 3*5 = 2x*3
=>6x + x = -15
=> x = -15/7

- x - 15 = 6x
7x = - 15
x = - 15/7

-x/3 - 5 = 2x
-x/3 - 2x = 5
3(-x/3 - 2x) = 3(5)
-3*x/3 - 3*2x = 15
-x - 6x = 15
-7x = 15
x = 15/-7
x = -15/7

Multiply the entire equation by three to eliminate the fraction. The result is -x-15=6x.
Add x to each side which yields -15 = 7x
Divide both sides by 7, which gives x = -15/7 = -2 1/7

(-1/3)x-5=2x
-5=(7/3)x (add (1/3)x to both sides)
(-15/7)=x (divide both sides by (7/3))

-x/3-5=2x

-x -15 = 6x
6x+x = -15
7x = -15
x = -15/7

*3 -x-15=6x 6x+x=15 7x=15 x=15/7=1 8/15