x(20-x)=99

Simple and best practice solution for x(20-x)=99 equation. Check how easy it is, and learn it for the future. Our solution is simple, and easy to understand, so don`t hesitate to use it as a solution of your homework.

If it's not what You are looking for type in the equation solver your own equation and let us solve it.

Solution for x(20-x)=99 equation:


Simplifying
x(20 + -1x) = 99
(20 * x + -1x * x) = 99
(20x + -1x2) = 99

Solving
20x + -1x2 = 99

Solving for variable 'x'.

Reorder the terms:
-99 + 20x + -1x2 = 99 + -99

Combine like terms: 99 + -99 = 0
-99 + 20x + -1x2 = 0

Factor a trinomial.
(-11 + x)(9 + -1x) = 0

Subproblem 1

Set the factor '(-11 + x)' equal to zero and attempt to solve: Simplifying -11 + x = 0 Solving -11 + x = 0 Move all terms containing x to the left, all other terms to the right. Add '11' to each side of the equation. -11 + 11 + x = 0 + 11 Combine like terms: -11 + 11 = 0 0 + x = 0 + 11 x = 0 + 11 Combine like terms: 0 + 11 = 11 x = 11 Simplifying x = 11

Subproblem 2

Set the factor '(9 + -1x)' equal to zero and attempt to solve: Simplifying 9 + -1x = 0 Solving 9 + -1x = 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 + -1x = 0 + -9 Combine like terms: 9 + -9 = 0 0 + -1x = 0 + -9 -1x = 0 + -9 Combine like terms: 0 + -9 = -9 -1x = -9 Divide each side by '-1'. x = 9 Simplifying x = 9

Solution

x = {11, 9}

See similar equations:

| -21r+27=-8 | | 129=-2x-3(7x+3) | | 4x-6x+3x= | | -22-9x+11x=20 | | T=12x+2 | | (10x+20)+12x=180 | | -22r+27=-8 | | b+54=3b | | -22-9+11x=20 | | -1.7-5x=-1.8 | | 6x^8+6x-24= | | 9x=3r-54 | | 3t^2+10t-360=0 | | 20x+5y=222522.12 | | u+10=2u | | 7+2m=2(m+6) | | 7j+14-5=16 | | 6(1-7m)=-246 | | 4(a^2-3a-4)-2(5a^2-a-6)= | | .5d=20 | | 3g+2(-3+5g)=1-g | | 6p=p+65 | | 500=25z+200 | | [B+4]=3 | | 2x-8+x=50 | | 16t^2=20 | | 2(6x-1)=22 | | x+2x+x-8=50 | | -192=4(1-7k) | | X^2=-2x+25 | | P-5-12=-9 | | 2x+x-8=50 |

Equations solver categories