-3(3n+8)=-8(n+3)n

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Solution for -3(3n+8)=-8(n+3)n equation:


Simplifying
-3(3n + 8) = -8(n + 3) * n

Reorder the terms:
-3(8 + 3n) = -8(n + 3) * n
(8 * -3 + 3n * -3) = -8(n + 3) * n
(-24 + -9n) = -8(n + 3) * n

Reorder the terms:
-24 + -9n = -8(3 + n) * n

Reorder the terms for easier multiplication:
-24 + -9n = -8n(3 + n)
-24 + -9n = (3 * -8n + n * -8n)
-24 + -9n = (-24n + -8n2)

Solving
-24 + -9n = -24n + -8n2

Solving for variable 'n'.

Combine like terms: -9n + 24n = 15n
-24 + 15n + 8n2 = -24n + -8n2 + 24n + 8n2

Reorder the terms:
-24 + 15n + 8n2 = -24n + 24n + -8n2 + 8n2

Combine like terms: -24n + 24n = 0
-24 + 15n + 8n2 = 0 + -8n2 + 8n2
-24 + 15n + 8n2 = -8n2 + 8n2

Combine like terms: -8n2 + 8n2 = 0
-24 + 15n + 8n2 = 0

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

Divide each side by '8'.
-3 + 1.875n + n2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 1.875n + 3 + n2 = 0 + 3

Reorder the terms:
-3 + 3 + 1.875n + n2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 1.875n + n2 = 0 + 3
1.875n + n2 = 0 + 3

Combine like terms: 0 + 3 = 3
1.875n + n2 = 3

The n term is 1.875n.  Take half its coefficient (0.9375).
Square it (0.87890625) and add it to both sides.

Add '0.87890625' to each side of the equation.
1.875n + 0.87890625 + n2 = 3 + 0.87890625

Reorder the terms:
0.87890625 + 1.875n + n2 = 3 + 0.87890625

Combine like terms: 3 + 0.87890625 = 3.87890625
0.87890625 + 1.875n + n2 = 3.87890625

Factor a perfect square on the left side:
(n + 0.9375)(n + 0.9375) = 3.87890625

Calculate the square root of the right side: 1.969493907

Break this problem into two subproblems by setting 
(n + 0.9375) equal to 1.969493907 and -1.969493907.

Subproblem 1

n + 0.9375 = 1.969493907 Simplifying n + 0.9375 = 1.969493907 Reorder the terms: 0.9375 + n = 1.969493907 Solving 0.9375 + n = 1.969493907 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.9375' to each side of the equation. 0.9375 + -0.9375 + n = 1.969493907 + -0.9375 Combine like terms: 0.9375 + -0.9375 = 0.0000 0.0000 + n = 1.969493907 + -0.9375 n = 1.969493907 + -0.9375 Combine like terms: 1.969493907 + -0.9375 = 1.031993907 n = 1.031993907 Simplifying n = 1.031993907

Subproblem 2

n + 0.9375 = -1.969493907 Simplifying n + 0.9375 = -1.969493907 Reorder the terms: 0.9375 + n = -1.969493907 Solving 0.9375 + n = -1.969493907 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.9375' to each side of the equation. 0.9375 + -0.9375 + n = -1.969493907 + -0.9375 Combine like terms: 0.9375 + -0.9375 = 0.0000 0.0000 + n = -1.969493907 + -0.9375 n = -1.969493907 + -0.9375 Combine like terms: -1.969493907 + -0.9375 = -2.906993907 n = -2.906993907 Simplifying n = -2.906993907

Solution

The solution to the problem is based on the solutions from the subproblems. n = {1.031993907, -2.906993907}

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