-3-8e+15+2e=4e+42

Solution for -3-8e+15+2e=4e+42 equation:

Simplifying
-3 + -8e + 15 + 2e = 4e + 42

Reorder the terms:
-3 + 15 + -8e + 2e = 4e + 42

Combine like terms: -3 + 15 = 12
12 + -8e + 2e = 4e + 42

Combine like terms: -8e + 2e = -6e
12 + -6e = 4e + 42

Reorder the terms:
12 + -6e = 42 + 4e

Solving
12 + -6e = 42 + 4e

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-4e' to each side of the equation.
12 + -6e + -4e = 42 + 4e + -4e

Combine like terms: -6e + -4e = -10e
12 + -10e = 42 + 4e + -4e

Combine like terms: 4e + -4e = 0
12 + -10e = 42 + 0
12 + -10e = 42

Add '-12' to each side of the equation.
12 + -12 + -10e = 42 + -12

Combine like terms: 12 + -12 = 0
0 + -10e = 42 + -12
-10e = 42 + -12

Combine like terms: 42 + -12 = 30
-10e = 30

Divide each side by '-10'.
e = -3

Simplifying
e = -3