20+23a=21a^2

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Solution for 20+23a=21a^2 equation:


Simplifying
20 + 23a = 21a2

Solving
20 + 23a = 21a2

Solving for variable 'a'.

Combine like terms: 21a2 + -21a2 = 0
20 + 23a + -21a2 = 0

Factor a trinomial.
(5 + -3a)(4 + 7a) = 0

Subproblem 1

Set the factor '(5 + -3a)' equal to zero and attempt to solve: Simplifying 5 + -3a = 0 Solving 5 + -3a = 0 Move all terms containing a to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -3a = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -3a = 0 + -5 -3a = 0 + -5 Combine like terms: 0 + -5 = -5 -3a = -5 Divide each side by '-3'. a = 1.666666667 Simplifying a = 1.666666667

Subproblem 2

Set the factor '(4 + 7a)' equal to zero and attempt to solve: Simplifying 4 + 7a = 0 Solving 4 + 7a = 0 Move all terms containing a to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 7a = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 7a = 0 + -4 7a = 0 + -4 Combine like terms: 0 + -4 = -4 7a = -4 Divide each side by '7'. a = -0.5714285714 Simplifying a = -0.5714285714

Solution

a = {1.666666667, -0.5714285714}

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