(10-x)(x-2)=15

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Solution for (10-x)(x-2)=15 equation:


Simplifying
(10 + -1x)(x + -2) = 15

Reorder the terms:
(10 + -1x)(-2 + x) = 15

Multiply (10 + -1x) * (-2 + x)
(10(-2 + x) + -1x * (-2 + x)) = 15
((-2 * 10 + x * 10) + -1x * (-2 + x)) = 15
((-20 + 10x) + -1x * (-2 + x)) = 15
(-20 + 10x + (-2 * -1x + x * -1x)) = 15
(-20 + 10x + (2x + -1x2)) = 15

Combine like terms: 10x + 2x = 12x
(-20 + 12x + -1x2) = 15

Solving
-20 + 12x + -1x2 = 15

Solving for variable 'x'.

Reorder the terms:
-20 + -15 + 12x + -1x2 = 15 + -15

Combine like terms: -20 + -15 = -35
-35 + 12x + -1x2 = 15 + -15

Combine like terms: 15 + -15 = 0
-35 + 12x + -1x2 = 0

Factor a trinomial.
(-7 + x)(5 + -1x) = 0

Subproblem 1

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

Subproblem 2

Set the factor '(5 + -1x)' equal to zero and attempt to solve: Simplifying 5 + -1x = 0 Solving 5 + -1x = 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 + -1x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -1x = 0 + -5 -1x = 0 + -5 Combine like terms: 0 + -5 = -5 -1x = -5 Divide each side by '-1'. x = 5 Simplifying x = 5

Solution

x = {7, 5}

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