20x^2+7=15x

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Solution for 20x^2+7=15x equation:


Simplifying
20x2 + 7 = 15x

Reorder the terms:
7 + 20x2 = 15x

Solving
7 + 20x2 = 15x

Solving for variable 'x'.

Reorder the terms:
7 + -15x + 20x2 = 15x + -15x

Combine like terms: 15x + -15x = 0
7 + -15x + 20x2 = 0

Begin completing the square.  Divide all terms by
20 the coefficient of the squared term: 

Divide each side by '20'.
0.35 + -0.75x + x2 = 0

Move the constant term to the right:

Add '-0.35' to each side of the equation.
0.35 + -0.75x + -0.35 + x2 = 0 + -0.35

Reorder the terms:
0.35 + -0.35 + -0.75x + x2 = 0 + -0.35

Combine like terms: 0.35 + -0.35 = 0.00
0.00 + -0.75x + x2 = 0 + -0.35
-0.75x + x2 = 0 + -0.35

Combine like terms: 0 + -0.35 = -0.35
-0.75x + x2 = -0.35

The x term is -0.75x.  Take half its coefficient (-0.375).
Square it (0.140625) and add it to both sides.

Add '0.140625' to each side of the equation.
-0.75x + 0.140625 + x2 = -0.35 + 0.140625

Reorder the terms:
0.140625 + -0.75x + x2 = -0.35 + 0.140625

Combine like terms: -0.35 + 0.140625 = -0.209375
0.140625 + -0.75x + x2 = -0.209375

Factor a perfect square on the left side:
(x + -0.375)(x + -0.375) = -0.209375

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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