2x-4x(3+7x)=3-8

Simple and best practice solution for 2x-4x(3+7x)=3-8 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 2x-4x(3+7x)=3-8 equation:


Simplifying
2x + -4x(3 + 7x) = 3 + -8
2x + (3 * -4x + 7x * -4x) = 3 + -8
2x + (-12x + -28x2) = 3 + -8

Combine like terms: 2x + -12x = -10x
-10x + -28x2 = 3 + -8

Combine like terms: 3 + -8 = -5
-10x + -28x2 = -5

Solving
-10x + -28x2 = -5

Solving for variable 'x'.

Reorder the terms:
5 + -10x + -28x2 = -5 + 5

Combine like terms: -5 + 5 = 0
5 + -10x + -28x2 = 0

Begin completing the square.  Divide all terms by
-28 the coefficient of the squared term: 

Divide each side by '-28'.
-0.1785714286 + 0.3571428571x + x2 = 0

Move the constant term to the right:

Add '0.1785714286' to each side of the equation.
-0.1785714286 + 0.3571428571x + 0.1785714286 + x2 = 0 + 0.1785714286

Reorder the terms:
-0.1785714286 + 0.1785714286 + 0.3571428571x + x2 = 0 + 0.1785714286

Combine like terms: -0.1785714286 + 0.1785714286 = 0.0000000000
0.0000000000 + 0.3571428571x + x2 = 0 + 0.1785714286
0.3571428571x + x2 = 0 + 0.1785714286

Combine like terms: 0 + 0.1785714286 = 0.1785714286
0.3571428571x + x2 = 0.1785714286

The x term is 0.3571428571x.  Take half its coefficient (0.1785714286).
Square it (0.03188775511) and add it to both sides.

Add '0.03188775511' to each side of the equation.
0.3571428571x + 0.03188775511 + x2 = 0.1785714286 + 0.03188775511

Reorder the terms:
0.03188775511 + 0.3571428571x + x2 = 0.1785714286 + 0.03188775511

Combine like terms: 0.1785714286 + 0.03188775511 = 0.21045918371
0.03188775511 + 0.3571428571x + x2 = 0.21045918371

Factor a perfect square on the left side:
(x + 0.1785714286)(x + 0.1785714286) = 0.21045918371

Calculate the square root of the right side: 0.458758306

Break this problem into two subproblems by setting 
(x + 0.1785714286) equal to 0.458758306 and -0.458758306.

Subproblem 1

x + 0.1785714286 = 0.458758306 Simplifying x + 0.1785714286 = 0.458758306 Reorder the terms: 0.1785714286 + x = 0.458758306 Solving 0.1785714286 + x = 0.458758306 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1785714286' to each side of the equation. 0.1785714286 + -0.1785714286 + x = 0.458758306 + -0.1785714286 Combine like terms: 0.1785714286 + -0.1785714286 = 0.0000000000 0.0000000000 + x = 0.458758306 + -0.1785714286 x = 0.458758306 + -0.1785714286 Combine like terms: 0.458758306 + -0.1785714286 = 0.2801868774 x = 0.2801868774 Simplifying x = 0.2801868774

Subproblem 2

x + 0.1785714286 = -0.458758306 Simplifying x + 0.1785714286 = -0.458758306 Reorder the terms: 0.1785714286 + x = -0.458758306 Solving 0.1785714286 + x = -0.458758306 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1785714286' to each side of the equation. 0.1785714286 + -0.1785714286 + x = -0.458758306 + -0.1785714286 Combine like terms: 0.1785714286 + -0.1785714286 = 0.0000000000 0.0000000000 + x = -0.458758306 + -0.1785714286 x = -0.458758306 + -0.1785714286 Combine like terms: -0.458758306 + -0.1785714286 = -0.6373297346 x = -0.6373297346 Simplifying x = -0.6373297346

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.2801868774, -0.6373297346}

See similar equations:

| g+5(g+-4)=4 | | 8-7x=83-42x | | 2x-4x=(3+7x)+3-8 | | 4x^2-11x+25=8x+4 | | -108-10x=8x+18 | | 5y-14y=28-35 | | -108-10= | | 37-7x=2x+18 | | 6s^2+19s-36=0 | | 67+3x= | | lnx+ln(x-3)=0 | | 5x^2-55x-30=0 | | 151-6x=3x+16 | | 2x=x+y | | 64-3x=6x+16 | | 12-7x=72-21x | | 70=x^2-6x | | 6x^2-14x-52=0 | | 2u+4=10 | | -2(t+3)=2 | | 2v+3=23 | | 4p+3q=-6 | | 7x-90=3x-10 | | 6x+38=13x-46 | | 59-2x=34x+19 | | 2x+8=23 | | 3(-2)-y=-9 | | 4X-2X-5=4+6X+3 | | 6x+6x+3+8=3x+5+8x | | 3x-2(-4)=2 | | 2x+36=12x+64 | | 6x+28=15x-71 |

Equations solver categories