21x+16=30x^2+50x+20

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Solution for 21x+16=30x^2+50x+20 equation:


Simplifying
21x + 16 = 30x2 + 50x + 20

Reorder the terms:
16 + 21x = 30x2 + 50x + 20

Reorder the terms:
16 + 21x = 20 + 50x + 30x2

Solving
16 + 21x = 20 + 50x + 30x2

Solving for variable 'x'.

Reorder the terms:
16 + -20 + 21x + -50x + -30x2 = 20 + 50x + 30x2 + -20 + -50x + -30x2

Combine like terms: 16 + -20 = -4
-4 + 21x + -50x + -30x2 = 20 + 50x + 30x2 + -20 + -50x + -30x2

Combine like terms: 21x + -50x = -29x
-4 + -29x + -30x2 = 20 + 50x + 30x2 + -20 + -50x + -30x2

Reorder the terms:
-4 + -29x + -30x2 = 20 + -20 + 50x + -50x + 30x2 + -30x2

Combine like terms: 20 + -20 = 0
-4 + -29x + -30x2 = 0 + 50x + -50x + 30x2 + -30x2
-4 + -29x + -30x2 = 50x + -50x + 30x2 + -30x2

Combine like terms: 50x + -50x = 0
-4 + -29x + -30x2 = 0 + 30x2 + -30x2
-4 + -29x + -30x2 = 30x2 + -30x2

Combine like terms: 30x2 + -30x2 = 0
-4 + -29x + -30x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(4 + 29x + 30x2) = 0

Factor a trinomial.
-1((4 + 5x)(1 + 6x)) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(4 + 5x)' equal to zero and attempt to solve: Simplifying 4 + 5x = 0 Solving 4 + 5x = 0 Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 5x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 5x = 0 + -4 5x = 0 + -4 Combine like terms: 0 + -4 = -4 5x = -4 Divide each side by '5'. x = -0.8 Simplifying x = -0.8

Subproblem 2

Set the factor '(1 + 6x)' equal to zero and attempt to solve: Simplifying 1 + 6x = 0 Solving 1 + 6x = 0 Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + 6x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + 6x = 0 + -1 6x = 0 + -1 Combine like terms: 0 + -1 = -1 6x = -1 Divide each side by '6'. x = -0.1666666667 Simplifying x = -0.1666666667

Solution

x = {-0.8, -0.1666666667}

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