x^2+x-1+11x=7x+3

Simple and best practice solution for x^2+x-1+11x=7x+3 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 x^2+x-1+11x=7x+3 equation:


Simplifying
x2 + x + -1 + 11x = 7x + 3

Reorder the terms:
-1 + x + 11x + x2 = 7x + 3

Combine like terms: x + 11x = 12x
-1 + 12x + x2 = 7x + 3

Reorder the terms:
-1 + 12x + x2 = 3 + 7x

Solving
-1 + 12x + x2 = 3 + 7x

Solving for variable 'x'.

Reorder the terms:
-1 + -3 + 12x + -7x + x2 = 3 + 7x + -3 + -7x

Combine like terms: -1 + -3 = -4
-4 + 12x + -7x + x2 = 3 + 7x + -3 + -7x

Combine like terms: 12x + -7x = 5x
-4 + 5x + x2 = 3 + 7x + -3 + -7x

Reorder the terms:
-4 + 5x + x2 = 3 + -3 + 7x + -7x

Combine like terms: 3 + -3 = 0
-4 + 5x + x2 = 0 + 7x + -7x
-4 + 5x + x2 = 7x + -7x

Combine like terms: 7x + -7x = 0
-4 + 5x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 5x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 5x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 5x + x2 = 0 + 4
5x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
5x + x2 = 4

The x term is 5x.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5x + 6.25 + x2 = 4 + 6.25

Reorder the terms:
6.25 + 5x + x2 = 4 + 6.25

Combine like terms: 4 + 6.25 = 10.25
6.25 + 5x + x2 = 10.25

Factor a perfect square on the left side:
(x + 2.5)(x + 2.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(x + 2.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

x + 2.5 = 3.201562119 Simplifying x + 2.5 = 3.201562119 Reorder the terms: 2.5 + x = 3.201562119 Solving 2.5 + x = 3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 3.201562119 + -2.5 x = 3.201562119 + -2.5 Combine like terms: 3.201562119 + -2.5 = 0.701562119 x = 0.701562119 Simplifying x = 0.701562119

Subproblem 2

x + 2.5 = -3.201562119 Simplifying x + 2.5 = -3.201562119 Reorder the terms: 2.5 + x = -3.201562119 Solving 2.5 + x = -3.201562119 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -3.201562119 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -3.201562119 + -2.5 x = -3.201562119 + -2.5 Combine like terms: -3.201562119 + -2.5 = -5.701562119 x = -5.701562119 Simplifying x = -5.701562119

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.701562119, -5.701562119}

See similar equations:

| 3+2x-2=6s+2-3s | | 6+4(x-6)=10-9(x-7) | | 3x+35=50 | | -2x+7=31 | | 5(x+3)2=0 | | x^2+2x+1=4x^2-12x+9 | | 5x+60=11x | | x^2=-45 | | 8d=-120 | | 3(4z-1)-2(z+5)=5(z+1) | | s^2-7s-30=0 | | -3x^2+0x+48=0 | | -4d=24 | | 2.8y+2.6=9.12-1.2y | | 9r+3r-5=25 | | -8=6-p | | -4(t-4)-(t+7)=7 | | 2x^3+7X^2-4x=0 | | x^2+16x+113=0 | | 7-(m-4)=-3m+(2m+1) | | 5=42+y | | 3-(2m-4)=8m+3 | | 6+6x-3=7-9x-8 | | -2x-2x+7=-9x | | -2(X+3)-3x=24 | | -6c-5=-215 | | 10t-45=-105 | | 5s+30=-75 | | 17x^2-5x+13=0 | | 4c+(-6)=250 | | 7k-5=19 | | 3p-2p+5p= |

Equations solver categories