0.2x^2+0.7x^2-0.4x^2=0

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Solution for 0.2x^2+0.7x^2-0.4x^2=0 equation: 


Simplifying
0.2x2 + 0.7x2 + -0.4x2 = 0

Combine like terms: 0.2x2 + 0.7x2 = 0.9x2
0.9x2 + -0.4x2 = 0

Combine like terms: 0.9x2 + -0.4x2 = 0.5x2
0.5x2 = 0

Solving
0.5x2 = 0

Solving for variable 'x'.

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

Divide each side by '0.5'.
x2 = 0

Simplifying
x2 = 0

Take the square root of each side:
x = {0}

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