3x-7=8x(x+1)

Simple and best practice solution for 3x-7=8x(x+1) 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 3x-7=8x(x+1) equation:


Simplifying
3x + -7 = 8x(x + 1)

Reorder the terms:
-7 + 3x = 8x(x + 1)

Reorder the terms:
-7 + 3x = 8x(1 + x)
-7 + 3x = (1 * 8x + x * 8x)
-7 + 3x = (8x + 8x2)

Solving
-7 + 3x = 8x + 8x2

Solving for variable 'x'.

Combine like terms: 3x + -8x = -5x
-7 + -5x + -8x2 = 8x + 8x2 + -8x + -8x2

Reorder the terms:
-7 + -5x + -8x2 = 8x + -8x + 8x2 + -8x2

Combine like terms: 8x + -8x = 0
-7 + -5x + -8x2 = 0 + 8x2 + -8x2
-7 + -5x + -8x2 = 8x2 + -8x2

Combine like terms: 8x2 + -8x2 = 0
-7 + -5x + -8x2 = 0

Factor out the Greatest Common Factor (GCF), '-1'.
-1(7 + 5x + 8x2) = 0

Ignore the factor -1.

Subproblem 1

Set the factor '(7 + 5x + 8x2)' equal to zero and attempt to solve: Simplifying 7 + 5x + 8x2 = 0 Solving 7 + 5x + 8x2 = 0 Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. 0.875 + 0.625x + x2 = 0 Move the constant term to the right: Add '-0.875' to each side of the equation. 0.875 + 0.625x + -0.875 + x2 = 0 + -0.875 Reorder the terms: 0.875 + -0.875 + 0.625x + x2 = 0 + -0.875 Combine like terms: 0.875 + -0.875 = 0.000 0.000 + 0.625x + x2 = 0 + -0.875 0.625x + x2 = 0 + -0.875 Combine like terms: 0 + -0.875 = -0.875 0.625x + x2 = -0.875 The x term is 0.625x. Take half its coefficient (0.3125). Square it (0.09765625) and add it to both sides. Add '0.09765625' to each side of the equation. 0.625x + 0.09765625 + x2 = -0.875 + 0.09765625 Reorder the terms: 0.09765625 + 0.625x + x2 = -0.875 + 0.09765625 Combine like terms: -0.875 + 0.09765625 = -0.77734375 0.09765625 + 0.625x + x2 = -0.77734375 Factor a perfect square on the left side: (x + 0.3125)(x + 0.3125) = -0.77734375 Can't calculate square root of the right side. The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

See similar equations:

| 4p+7=15+5p | | 14.5-4(2x-5)+3x=15 | | (2u-4)(2u^3-6u-28)= | | (2y-7)=(y+3) | | 4t+18=-18+15+7t | | 14q=10+15q | | t(2t-1)(t-3)=0 | | 2.4x+4.8=1.9-(x-3) | | n+2=-12+2n | | -12x=32 | | -33-x=12+2x | | -15+3r=4r | | 7+18f=17f | | 6[x-1]=6x-1 | | 4+16b=-16+17b | | -6-5x=-6x+9 | | x^2+y^2+2x+6y=26 | | 5.16+36=26.6256+6r | | -7(8x+8)=-392 | | 5x+11=2+8x | | 5(13)=y | | 3(6-8n)=162 | | 4-25b^2=0 | | 13-10x-18+6x=15-8x+12 | | 3x-50=62-5x | | x^2-3x-13.3=0 | | sec(30)=20 | | 8(8-5)=-56 | | i^2=81 | | 7(4a-2)=-182 | | 4(296-s)+1s=584 | | 3+2i+3a=3 |

Equations solver categories