5=-3(2x+1)7x

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Solution for 5=-3(2x+1)7x equation:


Simplifying
5 = -3(2x + 1) * 7x

Reorder the terms:
5 = -3(1 + 2x) * 7x

Reorder the terms for easier multiplication:
5 = -3 * 7x(1 + 2x)

Multiply -3 * 7
5 = -21x(1 + 2x)
5 = (1 * -21x + 2x * -21x)
5 = (-21x + -42x2)

Solving
5 = -21x + -42x2

Solving for variable 'x'.

Reorder the terms:
5 + 21x + 42x2 = -21x + 21x + -42x2 + 42x2

Combine like terms: -21x + 21x = 0
5 + 21x + 42x2 = 0 + -42x2 + 42x2
5 + 21x + 42x2 = -42x2 + 42x2

Combine like terms: -42x2 + 42x2 = 0
5 + 21x + 42x2 = 0

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

Divide each side by '42'.
0.119047619 + 0.5x + x2 = 0

Move the constant term to the right:

Add '-0.119047619' to each side of the equation.
0.119047619 + 0.5x + -0.119047619 + x2 = 0 + -0.119047619

Reorder the terms:
0.119047619 + -0.119047619 + 0.5x + x2 = 0 + -0.119047619

Combine like terms: 0.119047619 + -0.119047619 = 0.000000000
0.000000000 + 0.5x + x2 = 0 + -0.119047619
0.5x + x2 = 0 + -0.119047619

Combine like terms: 0 + -0.119047619 = -0.119047619
0.5x + x2 = -0.119047619

The x term is 0.5x.  Take half its coefficient (0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
0.5x + 0.0625 + x2 = -0.119047619 + 0.0625

Reorder the terms:
0.0625 + 0.5x + x2 = -0.119047619 + 0.0625

Combine like terms: -0.119047619 + 0.0625 = -0.056547619
0.0625 + 0.5x + x2 = -0.056547619

Factor a perfect square on the left side:
(x + 0.25)(x + 0.25) = -0.056547619

Can't calculate square root of the right side.

The solution to this equation could not be determined.

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