81x^2-81r+64=0

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Solution for 81x^2-81r+64=0 equation:


Simplifying
81x2 + -81r + 64 = 0

Reorder the terms:
64 + -81r + 81x2 = 0

Solving
64 + -81r + 81x2 = 0

Solving for variable 'r'.

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

Add '-64' to each side of the equation.
64 + -81r + -64 + 81x2 = 0 + -64

Reorder the terms:
64 + -64 + -81r + 81x2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -81r + 81x2 = 0 + -64
-81r + 81x2 = 0 + -64

Combine like terms: 0 + -64 = -64
-81r + 81x2 = -64

Add '-81x2' to each side of the equation.
-81r + 81x2 + -81x2 = -64 + -81x2

Combine like terms: 81x2 + -81x2 = 0
-81r + 0 = -64 + -81x2
-81r = -64 + -81x2

Divide each side by '-81'.
r = 0.7901234568 + x2

Simplifying
r = 0.7901234568 + x2

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