What does X equal in this equation? (Just need help on 2 questions PLZ!)

I am trying to find what X equals (=) in this equation:
-11 + X = 13 - X
and this equation:
10 + 2 • X = 7 • X + 3

I very confused!!! And if u have some extra time, please tell me how to solve this quicker. Thanks!

In -11 + X = 13 - X 2x = 24, making x = 12

In 10 + 2 • X = 7 • X + 3, assuming you mean 10 + (2 • X) = (7 • X) + 3
which is how the expression is interpreted the way you've typed it,
then 5x = 7 making x = 7/5

- 11 + x = 13 - x
2x = 24
x = 12.

10 + 2 * X = 7 * X + 3
10 + 2x = 7x + 3
- 5x = - 7
x = 7/5
or
x = 1 2/5.

-11 + X =13-x
+x. +x
-11 + 2X =13
+11. +11
2X = 24
/2. /2
X = 12

10+2•x = 7•x+3
12x = 10x
/10 /10
1.2 = x

2x = 24
x = 12

5x = 7
x = 7/5

here's what i got and how i did it...

http://www.picnik.com/app#/edit/basic