Solve for v
v=-Ex
\Delta \neq 0\text{ and }x\neq 0
Solve for E
E=-\frac{v}{x}
\Delta \neq 0\text{ and }x\neq 0
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Ex\Delta =\left(-\Delta \right)v
Multiply both sides of the equation by x\Delta .
\left(-\Delta \right)v=Ex\Delta
Swap sides so that all variable terms are on the left hand side.
\frac{\left(-\Delta \right)v}{-\Delta }=\frac{Ex\Delta }{-\Delta }
Divide both sides by -\Delta .
v=\frac{Ex\Delta }{-\Delta }
Dividing by -\Delta undoes the multiplication by -\Delta .
v=-Ex
Divide Ex\Delta by -\Delta .
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