x(x-7)=3(x+8)

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Solution for x(x-7)=3(x+8) equation: 


Simplifying
x(x + -7) = 3(x + 8)

Reorder the terms:
x(-7 + x) = 3(x + 8)
(-7 * x + x * x) = 3(x + 8)
(-7x + x2) = 3(x + 8)

Reorder the terms:
-7x + x2 = 3(8 + x)
-7x + x2 = (8 * 3 + x * 3)
-7x + x2 = (24 + 3x)

Solving
-7x + x2 = 24 + 3x

Solving for variable 'x'.

Reorder the terms:
-24 + -7x + -3x + x2 = 24 + 3x + -24 + -3x

Combine like terms: -7x + -3x = -10x
-24 + -10x + x2 = 24 + 3x + -24 + -3x

Reorder the terms:
-24 + -10x + x2 = 24 + -24 + 3x + -3x

Combine like terms: 24 + -24 = 0
-24 + -10x + x2 = 0 + 3x + -3x
-24 + -10x + x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-24 + -10x + x2 = 0

Factor a trinomial.
(-2 + -1x)(12 + -1x) = 0


Subproblem 1
Set the factor '(-2 + -1x)' equal to zero and attempt to solve:

Simplifying
-2 + -1x = 0

Solving
-2 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '2' to each side of the equation.
-2 + 2 + -1x = 0 + 2

Combine like terms: -2 + 2 = 0
0 + -1x = 0 + 2
-1x = 0 + 2

Combine like terms: 0 + 2 = 2
-1x = 2

Divide each side by '-1'.
x = -2

Simplifying
x = -2

Subproblem 2
Set the factor '(12 + -1x)' equal to zero and attempt to solve:

Simplifying
12 + -1x = 0

Solving
12 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '-12' to each side of the equation.
12 + -12 + -1x = 0 + -12

Combine like terms: 12 + -12 = 0
0 + -1x = 0 + -12
-1x = 0 + -12

Combine like terms: 0 + -12 = -12
-1x = -12

Divide each side by '-1'.
x = 12

Simplifying
x = 12
Solution
x = {-2, 12}

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