(x+2)(x+18)=7x

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Solution for (x+2)(x+18)=7x equation:


Simplifying
(x + 2)(x + 18) = 7x

Reorder the terms:
(2 + x)(x + 18) = 7x

Reorder the terms:
(2 + x)(18 + x) = 7x

Multiply (2 + x) * (18 + x)
(2(18 + x) + x(18 + x)) = 7x
((18 * 2 + x * 2) + x(18 + x)) = 7x
((36 + 2x) + x(18 + x)) = 7x
(36 + 2x + (18 * x + x * x)) = 7x
(36 + 2x + (18x + x2)) = 7x

Combine like terms: 2x + 18x = 20x
(36 + 20x + x2) = 7x

Solving
36 + 20x + x2 = 7x

Solving for variable 'x'.

Reorder the terms:
36 + 20x + -7x + x2 = 7x + -7x

Combine like terms: 20x + -7x = 13x
36 + 13x + x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
36 + 13x + x2 = 0

Factor a trinomial.
(9 + x)(4 + x) = 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 '(4 + x)' equal to zero and attempt to solve: Simplifying 4 + x = 0 Solving 4 + x = 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 + x = 0 + -4 Combine like terms: 4 + -4 = 0 0 + x = 0 + -4 x = 0 + -4 Combine like terms: 0 + -4 = -4 x = -4 Simplifying x = -4

Solution

x = {-9, -4}

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