-x^2+15x=54

Solution for -x^2+15x=54 equation:

Simplifying
-1x2 + 15x = 54

Reorder the terms:
15x + -1x2 = 54

Solving
15x + -1x2 = 54

Solving for variable 'x'.

Reorder the terms:
-54 + 15x + -1x2 = 54 + -54

Combine like terms: 54 + -54 = 0
-54 + 15x + -1x2 = 0

Factor a trinomial.
(-9 + x)(6 + -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 '(6 + -1x)' equal to zero and attempt to solve:

Simplifying
6 + -1x = 0

Solving
6 + -1x = 0

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

Add '-6' to each side of the equation.
6 + -6 + -1x = 0 + -6

Combine like terms: 6 + -6 = 0
0 + -1x = 0 + -6
-1x = 0 + -6

Combine like terms: 0 + -6 = -6
-1x = -6

Divide each side by '-1'.
x = 6

Simplifying
x = 6
Solution
x = {9, 6}