Answer:
Explanation:
reorder the terms:
7+ -9+ -15e-5e=0
combine like terms; 7+ -9=2
-2+ -15e+ -5e=0
-15e + -5=-20e
-2+ -20e=-
Move all terms containing e to the left, all other terms to the right.
Add '2' to each side of the equation.
-2 + 2 + -20e = 0 + 2
Combine like terms: -2 + 2 = 0
0 + -20e = 0 + 2
-20e = 0 + 2
Combine like terms: 0 + 2 = 2
-20e = 2
Divide each side by '-20'.
e = -0.1
Simplifying
e = -0.1