0.99x-8.91x=21

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Solution for 0.99x-8.91x=21 equation: 


Simplifying
0.99x + -8.91x = 21

Combine like terms: 0.99x + -8.91x = -7.92x
-7.92x = 21

Solving
-7.92x = 21

Solving for variable 'x'.

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

Divide each side by '-7.92'.
x = -2.651515152

Simplifying
x = -2.651515152

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