5(7n+32)+8(n+1)n=425

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Solution for 5(7n+32)+8(n+1)n=425 equation:


Simplifying
5(7n + 32) + 8(n + 1) * n = 425

Reorder the terms:
5(32 + 7n) + 8(n + 1) * n = 425
(32 * 5 + 7n * 5) + 8(n + 1) * n = 425
(160 + 35n) + 8(n + 1) * n = 425

Reorder the terms:
160 + 35n + 8(1 + n) * n = 425

Reorder the terms for easier multiplication:
160 + 35n + 8n(1 + n) = 425
160 + 35n + (1 * 8n + n * 8n) = 425
160 + 35n + (8n + 8n2) = 425

Combine like terms: 35n + 8n = 43n
160 + 43n + 8n2 = 425

Solving
160 + 43n + 8n2 = 425

Solving for variable 'n'.

Reorder the terms:
160 + -425 + 43n + 8n2 = 425 + -425

Combine like terms: 160 + -425 = -265
-265 + 43n + 8n2 = 425 + -425

Combine like terms: 425 + -425 = 0
-265 + 43n + 8n2 = 0

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

Divide each side by '8'.
-33.125 + 5.375n + n2 = 0

Move the constant term to the right:

Add '33.125' to each side of the equation.
-33.125 + 5.375n + 33.125 + n2 = 0 + 33.125

Reorder the terms:
-33.125 + 33.125 + 5.375n + n2 = 0 + 33.125

Combine like terms: -33.125 + 33.125 = 0.000
0.000 + 5.375n + n2 = 0 + 33.125
5.375n + n2 = 0 + 33.125

Combine like terms: 0 + 33.125 = 33.125
5.375n + n2 = 33.125

The n term is 5.375n.  Take half its coefficient (2.6875).
Square it (7.22265625) and add it to both sides.

Add '7.22265625' to each side of the equation.
5.375n + 7.22265625 + n2 = 33.125 + 7.22265625

Reorder the terms:
7.22265625 + 5.375n + n2 = 33.125 + 7.22265625

Combine like terms: 33.125 + 7.22265625 = 40.34765625
7.22265625 + 5.375n + n2 = 40.34765625

Factor a perfect square on the left side:
(n + 2.6875)(n + 2.6875) = 40.34765625

Calculate the square root of the right side: 6.351980498

Break this problem into two subproblems by setting 
(n + 2.6875) equal to 6.351980498 and -6.351980498.

Subproblem 1

n + 2.6875 = 6.351980498 Simplifying n + 2.6875 = 6.351980498 Reorder the terms: 2.6875 + n = 6.351980498 Solving 2.6875 + n = 6.351980498 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2.6875' to each side of the equation. 2.6875 + -2.6875 + n = 6.351980498 + -2.6875 Combine like terms: 2.6875 + -2.6875 = 0.0000 0.0000 + n = 6.351980498 + -2.6875 n = 6.351980498 + -2.6875 Combine like terms: 6.351980498 + -2.6875 = 3.664480498 n = 3.664480498 Simplifying n = 3.664480498

Subproblem 2

n + 2.6875 = -6.351980498 Simplifying n + 2.6875 = -6.351980498 Reorder the terms: 2.6875 + n = -6.351980498 Solving 2.6875 + n = -6.351980498 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2.6875' to each side of the equation. 2.6875 + -2.6875 + n = -6.351980498 + -2.6875 Combine like terms: 2.6875 + -2.6875 = 0.0000 0.0000 + n = -6.351980498 + -2.6875 n = -6.351980498 + -2.6875 Combine like terms: -6.351980498 + -2.6875 = -9.039480498 n = -9.039480498 Simplifying n = -9.039480498

Solution

The solution to the problem is based on the solutions from the subproblems. n = {3.664480498, -9.039480498}

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