15x-3=17-x(x+5)

Simple and best practice solution for 15x-3=17-x(x+5) 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 15x-3=17-x(x+5) equation:


Simplifying
15x + -3 = 17 + -1x(x + 5)

Reorder the terms:
-3 + 15x = 17 + -1x(x + 5)

Reorder the terms:
-3 + 15x = 17 + -1x(5 + x)
-3 + 15x = 17 + (5 * -1x + x * -1x)
-3 + 15x = 17 + (-5x + -1x2)

Solving
-3 + 15x = 17 + -5x + -1x2

Solving for variable 'x'.

Reorder the terms:
-3 + -17 + 15x + 5x + x2 = 17 + -5x + -1x2 + -17 + 5x + x2

Combine like terms: -3 + -17 = -20
-20 + 15x + 5x + x2 = 17 + -5x + -1x2 + -17 + 5x + x2

Combine like terms: 15x + 5x = 20x
-20 + 20x + x2 = 17 + -5x + -1x2 + -17 + 5x + x2

Reorder the terms:
-20 + 20x + x2 = 17 + -17 + -5x + 5x + -1x2 + x2

Combine like terms: 17 + -17 = 0
-20 + 20x + x2 = 0 + -5x + 5x + -1x2 + x2
-20 + 20x + x2 = -5x + 5x + -1x2 + x2

Combine like terms: -5x + 5x = 0
-20 + 20x + x2 = 0 + -1x2 + x2
-20 + 20x + x2 = -1x2 + x2

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

Begin completing the square.

Move the constant term to the right:

Add '20' to each side of the equation.
-20 + 20x + 20 + x2 = 0 + 20

Reorder the terms:
-20 + 20 + 20x + x2 = 0 + 20

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

Combine like terms: 0 + 20 = 20
20x + x2 = 20

The x term is 20x.  Take half its coefficient (10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
20x + 100 + x2 = 20 + 100

Reorder the terms:
100 + 20x + x2 = 20 + 100

Combine like terms: 20 + 100 = 120
100 + 20x + x2 = 120

Factor a perfect square on the left side:
(x + 10)(x + 10) = 120

Calculate the square root of the right side: 10.95445115

Break this problem into two subproblems by setting 
(x + 10) equal to 10.95445115 and -10.95445115.

Subproblem 1

x + 10 = 10.95445115 Simplifying x + 10 = 10.95445115 Reorder the terms: 10 + x = 10.95445115 Solving 10 + x = 10.95445115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 10.95445115 + -10 Combine like terms: 10 + -10 = 0 0 + x = 10.95445115 + -10 x = 10.95445115 + -10 Combine like terms: 10.95445115 + -10 = 0.95445115 x = 0.95445115 Simplifying x = 0.95445115

Subproblem 2

x + 10 = -10.95445115 Simplifying x + 10 = -10.95445115 Reorder the terms: 10 + x = -10.95445115 Solving 10 + x = -10.95445115 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -10.95445115 + -10 Combine like terms: 10 + -10 = 0 0 + x = -10.95445115 + -10 x = -10.95445115 + -10 Combine like terms: -10.95445115 + -10 = -20.95445115 x = -20.95445115 Simplifying x = -20.95445115

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.95445115, -20.95445115}

See similar equations:

| 5(6-2x)=8(x-3) | | 4y^2+9x^2-24y-72x=-180 | | -3x+15=x-25 | | 6x-7=4x-13 | | 3a=100+a | | 4(-3x-8)=-68 | | 65x=6 | | x/5=-3-(-9) | | ×/5=-3-(-9) | | 4y^2+4y^2+9x^2-24y-72x=-180 | | (5y+7)=(6-4y) | | -2x-6=4x-12 | | (2x-1)/3=7 | | 2x-1/3=7 | | 9x+15-8x=-6-13 | | 7(4x+6)=-70 | | 3x+y=1809x+y=360 | | (X+2)(X+3)-20=0 | | Ysquared-2y-8=0 | | -8a-3=9 | | 3x^3+1=82 | | 10-4x=6x-50 | | -6a=15 | | 3a=-30 | | 0.6y=v | | n=1000 | | 2x+2=-25+5x | | 3x^3+1=81 | | 7/-14 | | -3x-7y=-26 | | 10-5x=-2x-8 | | (0.5x^3)-(4x)= |

Equations solver categories