66=x-(.90x)

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Solution for 66=x-(.90x) equation:


Simplifying
66 = x + -1(0.90x)

Remove parenthesis around (0.90x)
66 = x + -1 * 0.90x

Multiply -1 * 0.90
66 = x + -0.9x

Combine like terms: x + -0.9x = 0.1x
66 = 0.1x

Solving
66 = 0.1x

Solving for variable 'x'.

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

Add '-0.1x' to each side of the equation.
66 + -0.1x = 0.1x + -0.1x

Combine like terms: 0.1x + -0.1x = 0.0
66 + -0.1x = 0.0

Add '-66' to each side of the equation.
66 + -66 + -0.1x = 0.0 + -66

Combine like terms: 66 + -66 = 0
0 + -0.1x = 0.0 + -66
-0.1x = 0.0 + -66

Combine like terms: 0.0 + -66 = -66
-0.1x = -66

Divide each side by '-0.1'.
x = 660

Simplifying
x = 660

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