4x^2-21x+51=7x+6

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Solution for 4x^2-21x+51=7x+6 equation:


Simplifying
4x2 + -21x + 51 = 7x + 6

Reorder the terms:
51 + -21x + 4x2 = 7x + 6

Reorder the terms:
51 + -21x + 4x2 = 6 + 7x

Solving
51 + -21x + 4x2 = 6 + 7x

Solving for variable 'x'.

Reorder the terms:
51 + -6 + -21x + -7x + 4x2 = 6 + 7x + -6 + -7x

Combine like terms: 51 + -6 = 45
45 + -21x + -7x + 4x2 = 6 + 7x + -6 + -7x

Combine like terms: -21x + -7x = -28x
45 + -28x + 4x2 = 6 + 7x + -6 + -7x

Reorder the terms:
45 + -28x + 4x2 = 6 + -6 + 7x + -7x

Combine like terms: 6 + -6 = 0
45 + -28x + 4x2 = 0 + 7x + -7x
45 + -28x + 4x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
45 + -28x + 4x2 = 0

Factor a trinomial.
(5 + -2x)(9 + -2x) = 0

Subproblem 1

Set the factor '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5

Subproblem 2

Set the factor '(9 + -2x)' equal to zero and attempt to solve: Simplifying 9 + -2x = 0 Solving 9 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + -2x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -2x = 0 + -9 -2x = 0 + -9 Combine like terms: 0 + -9 = -9 -2x = -9 Divide each side by '-2'. x = 4.5 Simplifying x = 4.5

Solution

x = {2.5, 4.5}

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