7x(x+8)=231

Solution for 7x(x+8)=231 equation:

Simplifying
7x(x + 8) = 231

Reorder the terms:
7x(8 + x) = 231
(8 * 7x + x * 7x) = 231
(56x + 7x2) = 231

Solving
56x + 7x2 = 231

Solving for variable 'x'.

Reorder the terms:
-231 + 56x + 7x2 = 231 + -231

Combine like terms: 231 + -231 = 0
-231 + 56x + 7x2 = 0

Factor out the Greatest Common Factor (GCF), '7'.
7(-33 + 8x + x2) = 0

Factor a trinomial.
7((-11 + -1x)(3 + -1x)) = 0

Ignore the factor 7.
Subproblem 1
Set the factor '(-11 + -1x)' equal to zero and attempt to solve:

Simplifying
-11 + -1x = 0

Solving
-11 + -1x = 0

Move all terms containing x to the left, all other terms to the right.

Add '11' to each side of the equation.
-11 + 11 + -1x = 0 + 11

Combine like terms: -11 + 11 = 0
0 + -1x = 0 + 11
-1x = 0 + 11

Combine like terms: 0 + 11 = 11
-1x = 11

Divide each side by '-1'.
x = -11

Simplifying
x = -11
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 = {-11, 3}