81x^2=16y^2

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Solution for 81x^2=16y^2 equation: 


Simplifying
81x2 = 16y2

Solving
81x2 = 16y2

Solving for variable 'x'.

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

Divide each side by '81'.
x2 = 0.1975308642y2

Simplifying
x2 = 0.1975308642y2

Take the square root of each side:
x = {-0.444444444y, 0.444444444y}

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