# -x = 2

#### frenchyff

##### New member
-x = 2
I know that x = -2 I just want to know why i am able to Divide both sides by -1.
is -x the same as (-1 times x) or is there a case where this is not true.

#### srmichael

##### Full Member
-x = 2
I know that x = -2 I just want to know why i am able to Divide both sides by -1.
is -x the same as (-1 times x) or is there a case where this is not true.
Yes, -x is the same as -1* x or you can also write it as (-1)x

#### JeffM

##### Elite Member
-x = 2
I know that x = -2 I just want to know why i am able to Divide both sides by -1.
is -x the same as (-1 times x) or is there a case where this is not true.
Or you can use multiplication

$$\displaystyle -x = 2 \implies (- 1 ) * (- x) = (-1) * 2 \implies x = - 2.$$

In general. $$\displaystyle - ax = u \implies (-1) * (-ax) = (-1) * u \implies ax = -u.$$

#### frenchyff

##### New member
Thanks guys this helped me alot. I am just beginning so thanks for being kind