55=0.20(285-10e)

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Solution for 55=0.20(285-10e) equation:


Simplifying
55 = 0.20(285 + -10e)
55 = (285 * 0.20 + -10e * 0.20)
55 = (57 + -2e)

Solving
55 = 57 + -2e

Solving for variable 'e'.

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

Add '2e' to each side of the equation.
55 + 2e = 57 + -2e + 2e

Combine like terms: -2e + 2e = 0
55 + 2e = 57 + 0
55 + 2e = 57

Add '-55' to each side of the equation.
55 + -55 + 2e = 57 + -55

Combine like terms: 55 + -55 = 0
0 + 2e = 57 + -55
2e = 57 + -55

Combine like terms: 57 + -55 = 2
2e = 2

Divide each side by '2'.
e = 1

Simplifying
e = 1

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