x(10-x)=9

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Solution for x(10-x)=9 equation:


Simplifying
x(10 + -1x) = 9
(10 * x + -1x * x) = 9
(10x + -1x2) = 9

Solving
10x + -1x2 = 9

Solving for variable 'x'.

Reorder the terms:
-9 + 10x + -1x2 = 9 + -9

Combine like terms: 9 + -9 = 0
-9 + 10x + -1x2 = 0

Factor a trinomial.
(-9 + x)(1 + -1x) = 0

Subproblem 1

Set the factor '(-9 + x)' equal to zero and attempt to solve: Simplifying -9 + x = 0 Solving -9 + x = 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 + x = 0 + 9 Combine like terms: -9 + 9 = 0 0 + x = 0 + 9 x = 0 + 9 Combine like terms: 0 + 9 = 9 x = 9 Simplifying x = 9

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 = {9, 1}

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