31+6x=2x(-x-6)

Simple and best practice solution for 31+6x=2x(-x-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 31+6x=2x(-x-6) equation:


Simplifying
31 + 6x = 2x(-1x + -6)

Reorder the terms:
31 + 6x = 2x(-6 + -1x)
31 + 6x = (-6 * 2x + -1x * 2x)
31 + 6x = (-12x + -2x2)

Solving
31 + 6x = -12x + -2x2

Solving for variable 'x'.

Combine like terms: 6x + 12x = 18x
31 + 18x + 2x2 = -12x + -2x2 + 12x + 2x2

Reorder the terms:
31 + 18x + 2x2 = -12x + 12x + -2x2 + 2x2

Combine like terms: -12x + 12x = 0
31 + 18x + 2x2 = 0 + -2x2 + 2x2
31 + 18x + 2x2 = -2x2 + 2x2

Combine like terms: -2x2 + 2x2 = 0
31 + 18x + 2x2 = 0

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
15.5 + 9x + x2 = 0

Move the constant term to the right:

Add '-15.5' to each side of the equation.
15.5 + 9x + -15.5 + x2 = 0 + -15.5

Reorder the terms:
15.5 + -15.5 + 9x + x2 = 0 + -15.5

Combine like terms: 15.5 + -15.5 = 0.0
0.0 + 9x + x2 = 0 + -15.5
9x + x2 = 0 + -15.5

Combine like terms: 0 + -15.5 = -15.5
9x + x2 = -15.5

The x term is 9x.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9x + 20.25 + x2 = -15.5 + 20.25

Reorder the terms:
20.25 + 9x + x2 = -15.5 + 20.25

Combine like terms: -15.5 + 20.25 = 4.75
20.25 + 9x + x2 = 4.75

Factor a perfect square on the left side:
(x + 4.5)(x + 4.5) = 4.75

Calculate the square root of the right side: 2.179449472

Break this problem into two subproblems by setting 
(x + 4.5) equal to 2.179449472 and -2.179449472.

Subproblem 1

x + 4.5 = 2.179449472 Simplifying x + 4.5 = 2.179449472 Reorder the terms: 4.5 + x = 2.179449472 Solving 4.5 + x = 2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = 2.179449472 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = 2.179449472 + -4.5 x = 2.179449472 + -4.5 Combine like terms: 2.179449472 + -4.5 = -2.320550528 x = -2.320550528 Simplifying x = -2.320550528

Subproblem 2

x + 4.5 = -2.179449472 Simplifying x + 4.5 = -2.179449472 Reorder the terms: 4.5 + x = -2.179449472 Solving 4.5 + x = -2.179449472 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + x = -2.179449472 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + x = -2.179449472 + -4.5 x = -2.179449472 + -4.5 Combine like terms: -2.179449472 + -4.5 = -6.679449472 x = -6.679449472 Simplifying x = -6.679449472

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-2.320550528, -6.679449472}

See similar equations:

| 3/7=n-7/2 | | -24=-4/9x | | 3x-10+2x-5=180 | | 49x^2+42x=17 | | 2x=5sin(2x) | | -15=-3/4w | | 12x+5=6(2x-8) | | -3.4t-3.1+-3.4+8.4+-4.7= | | (x^2)/(2)-5x=-8x | | 5(1+n)=2(7+n) | | 5x+22=-3+x | | 100(4x+380)+200(4x)+400(x)=86000 | | x^2+14x=26 | | M=20x+11 | | 25+x=4x-59 | | 2(8+-2t)+-10t= | | 4x+20=2(x-4) | | x^4+11x^3+34x^2-14x-60=0 | | 8y-24=4x | | (x-3)(x+8)=42 | | -5x^2-10x+6=0 | | 75(9.00+x)=11025 | | 7(X-7)-3x=-53 | | 13x^2-42x=147 | | 34/152 | | x^2+7x=-3 | | -10w+1+10w+-5= | | 1.5/2.4=2/3.2 | | Xsobre-4=1 | | 4e^2x=3 | | u-4.88=9.8 | | 7+10r+-8+-3= |

Equations solver categories