x = 21/4
First combine like terms on both sides of the equation: -4 + 5x - 7 = 10 + 3x - 2x
5x - 11 = 10 + x
Now, we want to isolate the variable, x, to one side. Preform the opposite operation (for + you subtract and for - you add) to combine like terms again.
5x -11 = 10 + x
+ 11 - x
These will cancel out and move to the other side of the equal sign.
5x - x = 10 + 11
4x = 21
Finally, divide each side by 6 to get x alone.
x = 21/4 or 5.25.