4x(x-5)=3x+7

Simple and best practice solution for 4x(x-5)=3x+7 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(x-5)=3x+7 equation:


Simplifying
4x(x + -5) = 3x + 7

Reorder the terms:
4x(-5 + x) = 3x + 7
(-5 * 4x + x * 4x) = 3x + 7
(-20x + 4x2) = 3x + 7

Reorder the terms:
-20x + 4x2 = 7 + 3x

Solving
-20x + 4x2 = 7 + 3x

Solving for variable 'x'.

Reorder the terms:
-7 + -20x + -3x + 4x2 = 7 + 3x + -7 + -3x

Combine like terms: -20x + -3x = -23x
-7 + -23x + 4x2 = 7 + 3x + -7 + -3x

Reorder the terms:
-7 + -23x + 4x2 = 7 + -7 + 3x + -3x

Combine like terms: 7 + -7 = 0
-7 + -23x + 4x2 = 0 + 3x + -3x
-7 + -23x + 4x2 = 3x + -3x

Combine like terms: 3x + -3x = 0
-7 + -23x + 4x2 = 0

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

Divide each side by '4'.
-1.75 + -5.75x + x2 = 0

Move the constant term to the right:

Add '1.75' to each side of the equation.
-1.75 + -5.75x + 1.75 + x2 = 0 + 1.75

Reorder the terms:
-1.75 + 1.75 + -5.75x + x2 = 0 + 1.75

Combine like terms: -1.75 + 1.75 = 0.00
0.00 + -5.75x + x2 = 0 + 1.75
-5.75x + x2 = 0 + 1.75

Combine like terms: 0 + 1.75 = 1.75
-5.75x + x2 = 1.75

The x term is -5.75x.  Take half its coefficient (-2.875).
Square it (8.265625) and add it to both sides.

Add '8.265625' to each side of the equation.
-5.75x + 8.265625 + x2 = 1.75 + 8.265625

Reorder the terms:
8.265625 + -5.75x + x2 = 1.75 + 8.265625

Combine like terms: 1.75 + 8.265625 = 10.015625
8.265625 + -5.75x + x2 = 10.015625

Factor a perfect square on the left side:
(x + -2.875)(x + -2.875) = 10.015625

Calculate the square root of the right side: 3.164747225

Break this problem into two subproblems by setting 
(x + -2.875) equal to 3.164747225 and -3.164747225.

Subproblem 1

x + -2.875 = 3.164747225 Simplifying x + -2.875 = 3.164747225 Reorder the terms: -2.875 + x = 3.164747225 Solving -2.875 + x = 3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + x = 3.164747225 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + x = 3.164747225 + 2.875 x = 3.164747225 + 2.875 Combine like terms: 3.164747225 + 2.875 = 6.039747225 x = 6.039747225 Simplifying x = 6.039747225

Subproblem 2

x + -2.875 = -3.164747225 Simplifying x + -2.875 = -3.164747225 Reorder the terms: -2.875 + x = -3.164747225 Solving -2.875 + x = -3.164747225 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.875' to each side of the equation. -2.875 + 2.875 + x = -3.164747225 + 2.875 Combine like terms: -2.875 + 2.875 = 0.000 0.000 + x = -3.164747225 + 2.875 x = -3.164747225 + 2.875 Combine like terms: -3.164747225 + 2.875 = -0.289747225 x = -0.289747225 Simplifying x = -0.289747225

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.039747225, -0.289747225}

See similar equations:

| 83+-3x=55 | | 0.625*x^2-1.5*x-5=0 | | -8n-8=-72 | | f(-3)=2+2 | | 29x+7y=-17 | | 8h-5=11-14 | | 36a^2-49b^2= | | 0.9/7.2 | | 96/-5 | | -18-21x=8x-106 | | 15+0.75x=9+1.50x | | 3-1x=17 | | 5x^4(x^2)=0 | | 0.9x-6=0.3x+30 | | 85,88-86,242/(-0,0715) | | F(x)=45-3x | | 3(a+6)=10[a-(5-a)] | | 7x-5y=-140 | | 3z/7-2=3 | | 2(8m+6)-5(6m+4)= | | 95=-4+33y | | 9x-1(7x+2)=3x+1(2-x) | | f(-3)=6/2x-3 | | G=50p+b | | 4z/9-3=-8 | | -8.15=-3.5+b | | 4(x-5)-(-2x-7)=9-2(4x+4) | | 4(n+6)=2(n-3)+4 | | 6x-12x-64=80 | | f(x)=2tan^5x | | =2.5m^2+1.5n+2.89 | | f(x)=2tg^5x |

Equations solver categories