(4x^2)+(5x^2)=784

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Solution for (4x^2)+(5x^2)=784 equation: 


Simplifying
(4x2) + (5x2) = 784

Combine like terms: (4x2) + (5x2) = 9x2
9x2 = 784

Solving
9x2 = 784

Solving for variable 'x'.

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

Divide each side by '9'.
x2 = 87.11111111

Simplifying
x2 = 87.11111111

Take the square root of each side:
x = {-9.333333333, 9.333333333}

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