3x^2+4x^2=400

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Solution for 3x^2+4x^2=400 equation: 


Simplifying
3x2 + 4x2 = 400

Combine like terms: 3x2 + 4x2 = 7x2
7x2 = 400

Solving
7x2 = 400

Solving for variable 'x'.

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

Divide each side by '7'.
x2 = 57.14285714

Simplifying
x2 = 57.14285714

Take the square root of each side:
x = {-7.55928946, 7.55928946}

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