(100-X)*0.4=X

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Solution for (100-X)*0.4=X equation:


Simplifying
(100 + -1X) * 0.4 = X

Reorder the terms for easier multiplication:
0.4(100 + -1X) = X
(100 * 0.4 + -1X * 0.4) = X
(40 + -0.4X) = X

Solving
40 + -0.4X = X

Solving for variable 'X'.

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

Add '-1X' to each side of the equation.
40 + -0.4X + -1X = X + -1X

Combine like terms: -0.4X + -1X = -1.4X
40 + -1.4X = X + -1X

Combine like terms: X + -1X = 0
40 + -1.4X = 0

Add '-40' to each side of the equation.
40 + -40 + -1.4X = 0 + -40

Combine like terms: 40 + -40 = 0
0 + -1.4X = 0 + -40
-1.4X = 0 + -40

Combine like terms: 0 + -40 = -40
-1.4X = -40

Divide each side by '-1.4'.
X = 28.57142857

Simplifying
X = 28.57142857

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