9x^2=21x

Simple and best practice solution for 9x^2=21x 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 9x^2=21x equation:


Simplifying
9x2 = 21x

Solving
9x2 = 21x

Solving for variable 'x'.

Reorder the terms:
-21x + 9x2 = 21x + -21x

Combine like terms: 21x + -21x = 0
-21x + 9x2 = 0

Factor out the Greatest Common Factor (GCF), '3x'.
3x(-7 + 3x) = 0

Ignore the factor 3.

Subproblem 1

Set the factor 'x' equal to zero and attempt to solve: Simplifying x = 0 Solving x = 0 Move all terms containing x to the left, all other terms to the right. Simplifying x = 0

Subproblem 2

Set the factor '(-7 + 3x)' equal to zero and attempt to solve: Simplifying -7 + 3x = 0 Solving -7 + 3x = 0 Move all terms containing x to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 7 + 3x = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 3x = 0 + 7 3x = 0 + 7 Combine like terms: 0 + 7 = 7 3x = 7 Divide each side by '3'. x = 2.333333333 Simplifying x = 2.333333333

Solution

x = {0, 2.333333333}

See similar equations:

| 2x+20=4x+6 | | x(3x-2)(x+6)= | | (3s-2)(4s+4)= | | 7x+32=x^2+4 | | 3.42/34.2 | | 3.42/24.2 | | 12=x/11 | | 8c*3v= | | -36x^2+96x-36=0 | | 2(5x+3)=4x-10 | | 1/6=6x | | 20x=460 | | 6=-3/5(4)+b | | 6=-3/5(4) | | -2x-6y=-74 | | 8x+3=6x+33 | | x+x+8+2x=240 | | 6x-(4x+3)=7 | | 6.3x=18.9 | | 9t^3+15t^2+t-6=t^2+t-6-3t^3 | | -12x^3+48x^2-36x=0 | | 8x+47=8(x+4) | | 7(4x-9)=40 | | 3x+6=-5-1x | | 3x^3+4x^4-6x^5-9x^6+14x^7-6x^8+x^9=0 | | ((a^4)/(2a^2-4a^4))*((8a^3+1)/(2a+4a^2)) | | 7(3x-9)=34 | | x-15=31 | | 5(7x-9)=20 | | 14-3x=-16 | | 6/7x-1/4x+10=11/14 | | 1/4(204a)=6a |

Equations solver categories