4x^2-9x+21=7x+6

Simple and best practice solution for 4x^2-9x+21=7x+6 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 4x^2-9x+21=7x+6 equation:


Simplifying
4x2 + -9x + 21 = 7x + 6

Reorder the terms:
21 + -9x + 4x2 = 7x + 6

Reorder the terms:
21 + -9x + 4x2 = 6 + 7x

Solving
21 + -9x + 4x2 = 6 + 7x

Solving for variable 'x'.

Reorder the terms:
21 + -6 + -9x + -7x + 4x2 = 6 + 7x + -6 + -7x

Combine like terms: 21 + -6 = 15
15 + -9x + -7x + 4x2 = 6 + 7x + -6 + -7x

Combine like terms: -9x + -7x = -16x
15 + -16x + 4x2 = 6 + 7x + -6 + -7x

Reorder the terms:
15 + -16x + 4x2 = 6 + -6 + 7x + -7x

Combine like terms: 6 + -6 = 0
15 + -16x + 4x2 = 0 + 7x + -7x
15 + -16x + 4x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
15 + -16x + 4x2 = 0

Factor a trinomial.
(3 + -2x)(5 + -2x) = 0

Subproblem 1

Set the factor '(3 + -2x)' equal to zero and attempt to solve: Simplifying 3 + -2x = 0 Solving 3 + -2x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -2x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -2x = 0 + -3 -2x = 0 + -3 Combine like terms: 0 + -3 = -3 -2x = -3 Divide each side by '-2'. x = 1.5 Simplifying x = 1.5

Subproblem 2

Set the factor '(5 + -2x)' equal to zero and attempt to solve: Simplifying 5 + -2x = 0 Solving 5 + -2x = 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 + -2x = 0 + -5 Combine like terms: 5 + -5 = 0 0 + -2x = 0 + -5 -2x = 0 + -5 Combine like terms: 0 + -5 = -5 -2x = -5 Divide each side by '-2'. x = 2.5 Simplifying x = 2.5

Solution

x = {1.5, 2.5}

See similar equations:

| 8x-7=6x-1 | | (7x-2)x(-5x+3)= | | (7x-2)-(-5x+3)= | | 7x-2+-5x+3= | | 3x^2-2=7 | | 15x^4-3x^2-18=0 | | 12x^3-14y^2-18=0 | | 12b^2-3b-15=0 | | b^2+9b=-20 | | 50*4+6-x=58 | | 0=5z-4-7+8z+9+-8z-z | | 5d+8e+8d+10e= | | X^3+2x^2+1=o | | 5d+8e= | | lnx-2=0 | | 9x+5=4x+9 | | 25-4x^2=0 | | 11-x=3 | | w=-.01(175)2+100(160) | | -.01(175)2+100(160)=w | | 5x-7+18-3x+6=6x+25-15-8x | | X^3+2px^2+p=0 | | 15=y*3+6 | | (2n^3-8n^2+7)+(n^3+8n-9)=0 | | 2x^2=x+2(3x+7) | | 9x^4-49=0 | | 2x+(3x+4)= | | 2*(7-3)= | | x^2+9x-6=0 | | 6x^2+5y^2+5x+3y=88 | | 2(6x-7)-4(5x-3)=2(x+9) | | 11x=-4 |

Equations solver categories