Ok let's say we have $\displaystyle 2x - 1 = 3x - 5$

Then let's try to get the x's and the numbers on different sides. In this case we will subtract the 2x from the left and right and add the 5 to the left and right then we will get our conclusion.

$\displaystyle 4 = x$ You can always plug that value back into the equation to make sure you got it right.

Here are a few others you can try.

$\displaystyle 5x + 1 = 8x - 8$

$\displaystyle 9x + 12 = 5x + 16$ (There's a little bit of a shortcut on this one see if you can notice it)

$\displaystyle 4x - 3 = 2x + 1$

$\displaystyle 11x + 20 = 13x - 10$