x^2+10x-15=9x+5

Solution for x^2+10x-15=9x+5 equation:

Simplifying
x2 + 10x + -15 = 9x + 5

Reorder the terms:
-15 + 10x + x2 = 9x + 5

Reorder the terms:
-15 + 10x + x2 = 5 + 9x

Solving
-15 + 10x + x2 = 5 + 9x

Solving for variable 'x'.

Reorder the terms:
-15 + -5 + 10x + -9x + x2 = 5 + 9x + -5 + -9x

Combine like terms: -15 + -5 = -20
-20 + 10x + -9x + x2 = 5 + 9x + -5 + -9x

Combine like terms: 10x + -9x = 1x
-20 + 1x + x2 = 5 + 9x + -5 + -9x

Reorder the terms:
-20 + 1x + x2 = 5 + -5 + 9x + -9x

Combine like terms: 5 + -5 = 0
-20 + 1x + x2 = 0 + 9x + -9x
-20 + 1x + x2 = 9x + -9x

Combine like terms: 9x + -9x = 0
-20 + 1x + x2 = 0

Factor a trinomial.
(-5 + -1x)(4 + -1x) = 0

Subproblem 1
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
Subproblem 2
Set the factor '(4 + -1x)' equal to zero and attempt to solve:

Simplifying
4 + -1x = 0

Solving
4 + -1x = 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 + -1x = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1x = 0 + -4
-1x = 0 + -4

Combine like terms: 0 + -4 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4
Solution
x = {-5, 4}