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7(9+15e)+19-49e+70+10e=90
We simplify the equation to the form, which is simple to understand
7(9+15e)+19-49e+70+10e=90
Reorder the terms in parentheses
+(+63+105e)+19-49e+70+10e=90
Remove unnecessary parentheses
+63+105e+19-49e+70+10e=+90
We move all terms containing e to the left and all other terms to the right.
+105e-49e+10e=+90-63-19-70
We simplify left and right side of the equation.
+66e=-62
We divide both sides of the equation by 66 to get e.
e=-0.93939393939394
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