21x^2+7x=x

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Solution for 21x^2+7x=x equation:


Simplifying
21x2 + 7x = x

Reorder the terms:
7x + 21x2 = x

Solving
7x + 21x2 = x

Solving for variable 'x'.

Reorder the terms:
7x + -1x + 21x2 = x + -1x

Combine like terms: 7x + -1x = 6x
6x + 21x2 = x + -1x

Combine like terms: x + -1x = 0
6x + 21x2 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(2 + 7x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(2 + 7x)' equal to zero and attempt to solve: Simplifying 2 + 7x = 0 Solving 2 + 7x = 0 Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + 7x = 0 + -2 Combine like terms: 2 + -2 = 0 0 + 7x = 0 + -2 7x = 0 + -2 Combine like terms: 0 + -2 = -2 7x = -2 Divide each side by '7'. x = -0.2857142857 Simplifying x = -0.2857142857

Solution

x = {0, -0.2857142857}

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