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4e-19=-3e+12
We simplify the equation to the form, which is simple to understand
4e-19=-3e+12
We move all terms containing e to the left and all other terms to the right.
+4e+3e=+12+19
We simplify left and right side of the equation.
+7e=+31
We divide both sides of the equation by 7 to get e.
e=4.42857142857
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