x-(.21*x)=10000

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Solution for x-(.21*x)=10000 equation: 


Simplifying
x + -1(0.21x) = 10000

Remove parenthesis around (0.21x)
x + -1 * 0.21x = 10000

Multiply -1 * 0.21
x + -0.21x = 10000

Combine like terms: x + -0.21x = 0.79x
0.79x = 10000

Solving
0.79x = 10000

Solving for variable 'x'.

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

Divide each side by '0.79'.
x = 12658.22785

Simplifying
x = 12658.22785

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