200x-x^2=55x+4200

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Solution for 200x-x^2=55x+4200 equation:


Simplifying
200x + -1x2 = 55x + 4200

Reorder the terms:
200x + -1x2 = 4200 + 55x

Solving
200x + -1x2 = 4200 + 55x

Solving for variable 'x'.

Reorder the terms:
-4200 + 200x + -55x + -1x2 = 4200 + 55x + -4200 + -55x

Combine like terms: 200x + -55x = 145x
-4200 + 145x + -1x2 = 4200 + 55x + -4200 + -55x

Reorder the terms:
-4200 + 145x + -1x2 = 4200 + -4200 + 55x + -55x

Combine like terms: 4200 + -4200 = 0
-4200 + 145x + -1x2 = 0 + 55x + -55x
-4200 + 145x + -1x2 = 55x + -55x

Combine like terms: 55x + -55x = 0
-4200 + 145x + -1x2 = 0

Factor a trinomial.
(-105 + x)(40 + -1x) = 0

Subproblem 1

Set the factor '(-105 + x)' equal to zero and attempt to solve: Simplifying -105 + x = 0 Solving -105 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '105' to each side of the equation. -105 + 105 + x = 0 + 105 Combine like terms: -105 + 105 = 0 0 + x = 0 + 105 x = 0 + 105 Combine like terms: 0 + 105 = 105 x = 105 Simplifying x = 105

Subproblem 2

Set the factor '(40 + -1x)' equal to zero and attempt to solve: Simplifying 40 + -1x = 0 Solving 40 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-40' to each side of the equation. 40 + -40 + -1x = 0 + -40 Combine like terms: 40 + -40 = 0 0 + -1x = 0 + -40 -1x = 0 + -40 Combine like terms: 0 + -40 = -40 -1x = -40 Divide each side by '-1'. x = 40 Simplifying x = 40

Solution

x = {105, 40}

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