7x+5=5x(x+4)

Simple and best practice solution for 7x+5=5x(x+4) 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 7x+5=5x(x+4) equation:


Simplifying
7x + 5 = 5x(x + 4)

Reorder the terms:
5 + 7x = 5x(x + 4)

Reorder the terms:
5 + 7x = 5x(4 + x)
5 + 7x = (4 * 5x + x * 5x)
5 + 7x = (20x + 5x2)

Solving
5 + 7x = 20x + 5x2

Solving for variable 'x'.

Combine like terms: 7x + -20x = -13x
5 + -13x + -5x2 = 20x + 5x2 + -20x + -5x2

Reorder the terms:
5 + -13x + -5x2 = 20x + -20x + 5x2 + -5x2

Combine like terms: 20x + -20x = 0
5 + -13x + -5x2 = 0 + 5x2 + -5x2
5 + -13x + -5x2 = 5x2 + -5x2

Combine like terms: 5x2 + -5x2 = 0
5 + -13x + -5x2 = 0

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

Divide each side by '-5'.
-1 + 2.6x + x2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + 2.6x + 1 + x2 = 0 + 1

Reorder the terms:
-1 + 1 + 2.6x + x2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2.6x + x2 = 0 + 1
2.6x + x2 = 0 + 1

Combine like terms: 0 + 1 = 1
2.6x + x2 = 1

The x term is 2.6x.  Take half its coefficient (1.3).
Square it (1.69) and add it to both sides.

Add '1.69' to each side of the equation.
2.6x + 1.69 + x2 = 1 + 1.69

Reorder the terms:
1.69 + 2.6x + x2 = 1 + 1.69

Combine like terms: 1 + 1.69 = 2.69
1.69 + 2.6x + x2 = 2.69

Factor a perfect square on the left side:
(x + 1.3)(x + 1.3) = 2.69

Calculate the square root of the right side: 1.640121947

Break this problem into two subproblems by setting 
(x + 1.3) equal to 1.640121947 and -1.640121947.

Subproblem 1

x + 1.3 = 1.640121947 Simplifying x + 1.3 = 1.640121947 Reorder the terms: 1.3 + x = 1.640121947 Solving 1.3 + x = 1.640121947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = 1.640121947 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = 1.640121947 + -1.3 x = 1.640121947 + -1.3 Combine like terms: 1.640121947 + -1.3 = 0.340121947 x = 0.340121947 Simplifying x = 0.340121947

Subproblem 2

x + 1.3 = -1.640121947 Simplifying x + 1.3 = -1.640121947 Reorder the terms: 1.3 + x = -1.640121947 Solving 1.3 + x = -1.640121947 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.3' to each side of the equation. 1.3 + -1.3 + x = -1.640121947 + -1.3 Combine like terms: 1.3 + -1.3 = 0.0 0.0 + x = -1.640121947 + -1.3 x = -1.640121947 + -1.3 Combine like terms: -1.640121947 + -1.3 = -2.940121947 x = -2.940121947 Simplifying x = -2.940121947

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.340121947, -2.940121947}

See similar equations:

| 14+6x=5-5(x-4) | | 7+8x-6=33 | | x^2+35x+59= | | 3(w+2)+2(w-1)=14 | | -4d+6+2d=-14 | | 5y+3=-52 | | 7x-y+7=0 | | y^2+10y+70=0 | | 3s-2s=20 | | -5d+6d-21=-5 | | 2s-2s=20 | | 11-y=-1 | | 1.2d-2=4 | | .83k+.66=1.33 | | 7k=84 | | 6h+5h-25=52 | | 16x^2+32x-80=0 | | p=-750x^2+15000x | | 3x+y-4=0 | | -w+4w+12=-12 | | 50x=7(7y+4) | | 10+y=17 | | 7(6x-1)=203 | | 3f+6=-15 | | y+x+z=28 | | 4x+5(13)=9 | | .66=1.33-.83k | | 2b-(3b)=45 | | .2x-8=-2+x | | 6n-12-2n=24 | | 5a=-2b+6 | | 12-(-3y)=-27 |

Equations solver categories