122+15x=x(72-5x)

Simple and best practice solution for 122+15x=x(72-5x) 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 122+15x=x(72-5x) equation:


Simplifying
122 + 15x = x(72 + -5x)
122 + 15x = (72 * x + -5x * x)
122 + 15x = (72x + -5x2)

Solving
122 + 15x = 72x + -5x2

Solving for variable 'x'.

Combine like terms: 15x + -72x = -57x
122 + -57x + 5x2 = 72x + -5x2 + -72x + 5x2

Reorder the terms:
122 + -57x + 5x2 = 72x + -72x + -5x2 + 5x2

Combine like terms: 72x + -72x = 0
122 + -57x + 5x2 = 0 + -5x2 + 5x2
122 + -57x + 5x2 = -5x2 + 5x2

Combine like terms: -5x2 + 5x2 = 0
122 + -57x + 5x2 = 0

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

Divide each side by '5'.
24.4 + -11.4x + x2 = 0

Move the constant term to the right:

Add '-24.4' to each side of the equation.
24.4 + -11.4x + -24.4 + x2 = 0 + -24.4

Reorder the terms:
24.4 + -24.4 + -11.4x + x2 = 0 + -24.4

Combine like terms: 24.4 + -24.4 = 0.0
0.0 + -11.4x + x2 = 0 + -24.4
-11.4x + x2 = 0 + -24.4

Combine like terms: 0 + -24.4 = -24.4
-11.4x + x2 = -24.4

The x term is -11.4x.  Take half its coefficient (-5.7).
Square it (32.49) and add it to both sides.

Add '32.49' to each side of the equation.
-11.4x + 32.49 + x2 = -24.4 + 32.49

Reorder the terms:
32.49 + -11.4x + x2 = -24.4 + 32.49

Combine like terms: -24.4 + 32.49 = 8.09
32.49 + -11.4x + x2 = 8.09

Factor a perfect square on the left side:
(x + -5.7)(x + -5.7) = 8.09

Calculate the square root of the right side: 2.844292531

Break this problem into two subproblems by setting 
(x + -5.7) equal to 2.844292531 and -2.844292531.

Subproblem 1

x + -5.7 = 2.844292531 Simplifying x + -5.7 = 2.844292531 Reorder the terms: -5.7 + x = 2.844292531 Solving -5.7 + x = 2.844292531 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.7' to each side of the equation. -5.7 + 5.7 + x = 2.844292531 + 5.7 Combine like terms: -5.7 + 5.7 = 0.0 0.0 + x = 2.844292531 + 5.7 x = 2.844292531 + 5.7 Combine like terms: 2.844292531 + 5.7 = 8.544292531 x = 8.544292531 Simplifying x = 8.544292531

Subproblem 2

x + -5.7 = -2.844292531 Simplifying x + -5.7 = -2.844292531 Reorder the terms: -5.7 + x = -2.844292531 Solving -5.7 + x = -2.844292531 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5.7' to each side of the equation. -5.7 + 5.7 + x = -2.844292531 + 5.7 Combine like terms: -5.7 + 5.7 = 0.0 0.0 + x = -2.844292531 + 5.7 x = -2.844292531 + 5.7 Combine like terms: -2.844292531 + 5.7 = 2.855707469 x = 2.855707469 Simplifying x = 2.855707469

Solution

The solution to the problem is based on the solutions from the subproblems. x = {8.544292531, 2.855707469}

See similar equations:

| -16t^2+32t+384=h | | 4-6x=(4x-40) | | 1/4(20-x)6 | | -11=8x+313 | | x-5=-8+3 | | 12=3-n | | 9m=29+3 | | n/-8=23 | | 3(v+2)+7v= | | 5x-2(2x-1)=4 | | 3x+(2x+16)=90 | | N+3.4=7 | | =-3+10 | | X^3=20000 | | 0.5(10x+20)-5=0.1(50x+50) | | -4(6n-5)+3n=0 | | 4x-9=7a+12 | | 6x+6x+3+8=4x+5+7x | | 29x=36x(x)-20 | | 6y=3x | | 12-y=19 | | 1.29g+3.59=10.04 | | x+40+x-10=180 | | 200-10x=24x-40 | | 6=.5(5)+b | | -20.3-14.34= | | 0.0x+0.07(15000-x)=1.110 | | 9/15=125/x | | 9E+9= | | 32x+8=20x+80 | | X(.95)+Y(.99)=4.87 | | 11k-8-9k=-16 |

Equations solver categories