2x^2+0.4x^2=18

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Solution for 2x^2+0.4x^2=18 equation: 


Simplifying
2x2 + 0.4x2 = 18

Combine like terms: 2x2 + 0.4x2 = 2.4x2
2.4x2 = 18

Solving
2.4x2 = 18

Solving for variable 'x'.

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

Divide each side by '2.4'.
x2 = 7.5

Simplifying
x2 = 7.5

Take the square root of each side:
x = {-2.738612788, 2.738612788}

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