7x^2+7x=84

Simple and best practice solution for 7x^2+7x=84 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 7x^2+7x=84 equation:


Simplifying
7x2 + 7x = 84

Reorder the terms:
7x + 7x2 = 84

Solving
7x + 7x2 = 84

Solving for variable 'x'.

Reorder the terms:
-84 + 7x + 7x2 = 84 + -84

Combine like terms: 84 + -84 = 0
-84 + 7x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-12 + x + x2) = 0

Factor a trinomial.
7((-4 + -1x)(3 + -1x)) = 0

Ignore the factor 7.

Subproblem 1

Set the factor '(-4 + -1x)' equal to zero and attempt to solve: Simplifying -4 + -1x = 0 Solving -4 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + -1x = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -1x = 0 + 4 -1x = 0 + 4 Combine like terms: 0 + 4 = 4 -1x = 4 Divide each side by '-1'. x = -4 Simplifying x = -4

Subproblem 2

Set the factor '(3 + -1x)' equal to zero and attempt to solve: Simplifying 3 + -1x = 0 Solving 3 + -1x = 0 Move all terms containing x to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -1x = 0 + -3 Combine like terms: 3 + -3 = 0 0 + -1x = 0 + -3 -1x = 0 + -3 Combine like terms: 0 + -3 = -3 -1x = -3 Divide each side by '-1'. x = 3 Simplifying x = 3

Solution

x = {-4, 3}

See similar equations:

| 7x(9-4)=152 | | -8x+120=176 | | x^2-13=-4x | | 5.4x-4.2-7.3x=-2.5-1.9x-1.7 | | 12x^2+87=0 | | x^2+2x+2=36 | | 14x-44= | | x(2x-5)=42 | | -2(7u-2)+8u=4(u+2) | | [2](3x-4)=5 | | 4cos^2(x)-9=0 | | 2cosx-7cosx-4=0 | | 4(u-4)-6=-4(-4u+8)-8u | | 4xX+7=29 | | X-.05x=358400 | | 10x-5=6x-6 | | 1x+2=2x | | x/1.875x | | 2580+2920=x | | 2x-5+4x-19=180 | | 3x-1=9x | | 0.04/800 | | 1.5d-5=8 | | b-10+7b= | | 1=2/x | | 27/4=9/4x | | 1/5{s=2/3}-3/10s=-1/5 | | 550=660*(100/x) | | 6f= | | 4y-7+y+24=5y+20-3y | | 14+6x= | | 48=4k |

Equations solver categories