4x(3+x)=16+x

Simple and best practice solution for 4x(3+x)=16+x 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 4x(3+x)=16+x equation:


Simplifying
4x(3 + x) = 16 + x
(3 * 4x + x * 4x) = 16 + x
(12x + 4x2) = 16 + x

Solving
12x + 4x2 = 16 + x

Solving for variable 'x'.

Reorder the terms:
-16 + 12x + -1x + 4x2 = 16 + x + -16 + -1x

Combine like terms: 12x + -1x = 11x
-16 + 11x + 4x2 = 16 + x + -16 + -1x

Reorder the terms:
-16 + 11x + 4x2 = 16 + -16 + x + -1x

Combine like terms: 16 + -16 = 0
-16 + 11x + 4x2 = 0 + x + -1x
-16 + 11x + 4x2 = x + -1x

Combine like terms: x + -1x = 0
-16 + 11x + 4x2 = 0

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

Divide each side by '4'.
-4 + 2.75x + x2 = 0

Move the constant term to the right:

Add '4' to each side of the equation.
-4 + 2.75x + 4 + x2 = 0 + 4

Reorder the terms:
-4 + 4 + 2.75x + x2 = 0 + 4

Combine like terms: -4 + 4 = 0
0 + 2.75x + x2 = 0 + 4
2.75x + x2 = 0 + 4

Combine like terms: 0 + 4 = 4
2.75x + x2 = 4

The x term is 2.75x.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75x + 1.890625 + x2 = 4 + 1.890625

Reorder the terms:
1.890625 + 2.75x + x2 = 4 + 1.890625

Combine like terms: 4 + 1.890625 = 5.890625
1.890625 + 2.75x + x2 = 5.890625

Factor a perfect square on the left side:
(x + 1.375)(x + 1.375) = 5.890625

Calculate the square root of the right side: 2.42706098

Break this problem into two subproblems by setting 
(x + 1.375) equal to 2.42706098 and -2.42706098.

Subproblem 1

x + 1.375 = 2.42706098 Simplifying x + 1.375 = 2.42706098 Reorder the terms: 1.375 + x = 2.42706098 Solving 1.375 + x = 2.42706098 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = 2.42706098 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = 2.42706098 + -1.375 x = 2.42706098 + -1.375 Combine like terms: 2.42706098 + -1.375 = 1.05206098 x = 1.05206098 Simplifying x = 1.05206098

Subproblem 2

x + 1.375 = -2.42706098 Simplifying x + 1.375 = -2.42706098 Reorder the terms: 1.375 + x = -2.42706098 Solving 1.375 + x = -2.42706098 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + x = -2.42706098 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + x = -2.42706098 + -1.375 x = -2.42706098 + -1.375 Combine like terms: -2.42706098 + -1.375 = -3.80206098 x = -3.80206098 Simplifying x = -3.80206098

Solution

The solution to the problem is based on the solutions from the subproblems. x = {1.05206098, -3.80206098}

See similar equations:

| 6x-5-2x=3y+7-4x | | 7.2a=13.53+2.81a | | y-12=3y-2 | | .12a-.08b=0 | | 5n/3-3/7=61/21 | | 20m+12n-5m+13n+65= | | 5/r-9=8/r+5 | | 4x-24=4x+60 | | 6w-14=4w+24 | | 7x-1=-85 | | 6w-14=4w | | 1/2(2x+54)=1/3(9x+27) | | w/2-3(6)=53 | | 6/7x-3=45 | | (4x+3)/9-(2x+1)/2=0 | | 35+0.10p=25+0.25p | | 0.023X+0.08=0.36X-5.266 | | 35p+0.10=25p+0.25 | | 13b+9-12c= | | 8=g/7 | | 180=2x+(x-8)+x | | -2/5r+2r=1/5r+14/3 | | (4x+3)/9 | | -3x^2-14x-15=0 | | 8x-4x+3x-9x= | | 12a+10b-5a+17b+46= | | 900-880= | | 4x+y=2(x+3y) | | 5(X-3)/6-X=1-X/9 | | 3/5x-13=23 | | 1.2x-2.4+2.3x=15.1 | | y+78=180 |

Equations solver categories