x-21=0.91x

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Solution for x-21=0.91x equation:


Simplifying
x + -21 = 0.91x

Reorder the terms:
-21 + x = 0.91x

Solving
-21 + x = 0.91x

Solving for variable 'x'.

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

Add '-0.91x' to each side of the equation.
-21 + x + -0.91x = 0.91x + -0.91x

Combine like terms: x + -0.91x = 0.09x
-21 + 0.09x = 0.91x + -0.91x

Combine like terms: 0.91x + -0.91x = 0.00
-21 + 0.09x = 0.00

Add '21' to each side of the equation.
-21 + 21 + 0.09x = 0.00 + 21

Combine like terms: -21 + 21 = 0
0 + 0.09x = 0.00 + 21
0.09x = 0.00 + 21

Combine like terms: 0.00 + 21 = 21
0.09x = 21

Divide each side by '0.09'.
x = 233.3333333

Simplifying
x = 233.3333333

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