Question

This is a literal equation.

Answer 1

$V^2=V_0^2+2a\Delta x\\ 2a\Delta x=V^2-V_0^2\\ a=\frac{V^2-V_0^2}{2\Delta x}$

Answer 2

Assuming this is the equation you want to operate on:
$v^{2} = (v_0)^{2} + 2\cdot a \cdot \Deltax$
$2\cdot a \cdot \Delta x = v^{2} - (v_0)^{2}$
$a = \frac{v^{2} - (v_0)^{2}}{2\cdot \Delta x}$
Before final operation we have to assume that x is not equal to 0. :)