-x^2+8x=2x+5

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Solution for -x^2+8x=2x+5 equation:


Simplifying
-1x2 + 8x = 2x + 5

Reorder the terms:
8x + -1x2 = 2x + 5

Reorder the terms:
8x + -1x2 = 5 + 2x

Solving
8x + -1x2 = 5 + 2x

Solving for variable 'x'.

Reorder the terms:
-5 + 8x + -2x + -1x2 = 5 + 2x + -5 + -2x

Combine like terms: 8x + -2x = 6x
-5 + 6x + -1x2 = 5 + 2x + -5 + -2x

Reorder the terms:
-5 + 6x + -1x2 = 5 + -5 + 2x + -2x

Combine like terms: 5 + -5 = 0
-5 + 6x + -1x2 = 0 + 2x + -2x
-5 + 6x + -1x2 = 2x + -2x

Combine like terms: 2x + -2x = 0
-5 + 6x + -1x2 = 0

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

Subproblem 1

Set the factor '(-5 + x)' equal to zero and attempt to solve: Simplifying -5 + x = 0 Solving -5 + x = 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 + x = 0 + 5 Combine like terms: -5 + 5 = 0 0 + x = 0 + 5 x = 0 + 5 Combine like terms: 0 + 5 = 5 x = 5 Simplifying x = 5

Subproblem 2

Set the factor '(1 + -1x)' equal to zero and attempt to solve: Simplifying 1 + -1x = 0 Solving 1 + -1x = 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 + -1x = 0 + -1 Combine like terms: 1 + -1 = 0 0 + -1x = 0 + -1 -1x = 0 + -1 Combine like terms: 0 + -1 = -1 -1x = -1 Divide each side by '-1'. x = 1 Simplifying x = 1

Solution

x = {5, 1}

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