x-15=x(.80)

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Solution for x-15=x(.80) equation:


Simplifying
x + -15 = x(0.80)

Reorder the terms:
-15 + x = x(0.80)

Reorder the terms for easier multiplication:
-15 + x = 0.80x

Solving
-15 + x = 0.80x

Solving for variable 'x'.

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

Add '-0.80x' to each side of the equation.
-15 + x + -0.80x = 0.80x + -0.80x

Combine like terms: x + -0.80x = 0.2x
-15 + 0.2x = 0.80x + -0.80x

Combine like terms: 0.80x + -0.80x = 0.00
-15 + 0.2x = 0.00

Add '15' to each side of the equation.
-15 + 15 + 0.2x = 0.00 + 15

Combine like terms: -15 + 15 = 0
0 + 0.2x = 0.00 + 15
0.2x = 0.00 + 15

Combine like terms: 0.00 + 15 = 15
0.2x = 15

Divide each side by '0.2'.
x = 75

Simplifying
x = 75

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