x-900=.8x

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Solution for x-900=.8x equation:


Simplifying
x + -900 = 0.8x

Reorder the terms:
-900 + x = 0.8x

Solving
-900 + x = 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
-900 + x + -0.8x = 0.8x + -0.8x

Combine like terms: x + -0.8x = 0.2x
-900 + 0.2x = 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
-900 + 0.2x = 0.0

Add '900' to each side of the equation.
-900 + 900 + 0.2x = 0.0 + 900

Combine like terms: -900 + 900 = 0
0 + 0.2x = 0.0 + 900
0.2x = 0.0 + 900

Combine like terms: 0.0 + 900 = 900
0.2x = 900

Divide each side by '0.2'.
x = 4500

Simplifying
x = 4500

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