2(1.5n+4)6n=-7

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Solution for 2(1.5n+4)6n=-7 equation:


Simplifying
2(1.5n + 4) * 6n = -7

Reorder the terms:
2(4 + 1.5n) * 6n = -7

Reorder the terms for easier multiplication:
2 * 6n(4 + 1.5n) = -7

Multiply 2 * 6
12n(4 + 1.5n) = -7
(4 * 12n + 1.5n * 12n) = -7
(48n + 18n2) = -7

Solving
48n + 18n2 = -7

Solving for variable 'n'.

Reorder the terms:
7 + 48n + 18n2 = -7 + 7

Combine like terms: -7 + 7 = 0
7 + 48n + 18n2 = 0

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

Divide each side by '18'.
0.3888888889 + 2.666666667n + n2 = 0

Move the constant term to the right:

Add '-0.3888888889' to each side of the equation.
0.3888888889 + 2.666666667n + -0.3888888889 + n2 = 0 + -0.3888888889

Reorder the terms:
0.3888888889 + -0.3888888889 + 2.666666667n + n2 = 0 + -0.3888888889

Combine like terms: 0.3888888889 + -0.3888888889 = 0.0000000000
0.0000000000 + 2.666666667n + n2 = 0 + -0.3888888889
2.666666667n + n2 = 0 + -0.3888888889

Combine like terms: 0 + -0.3888888889 = -0.3888888889
2.666666667n + n2 = -0.3888888889

The n term is 2.666666667n.  Take half its coefficient (1.333333334).
Square it (1.777777780) and add it to both sides.

Add '1.777777780' to each side of the equation.
2.666666667n + 1.777777780 + n2 = -0.3888888889 + 1.777777780

Reorder the terms:
1.777777780 + 2.666666667n + n2 = -0.3888888889 + 1.777777780

Combine like terms: -0.3888888889 + 1.777777780 = 1.3888888911
1.777777780 + 2.666666667n + n2 = 1.3888888911

Factor a perfect square on the left side:
(n + 1.333333334)(n + 1.333333334) = 1.3888888911

Calculate the square root of the right side: 1.178511303

Break this problem into two subproblems by setting 
(n + 1.333333334) equal to 1.178511303 and -1.178511303.

Subproblem 1

n + 1.333333334 = 1.178511303 Simplifying n + 1.333333334 = 1.178511303 Reorder the terms: 1.333333334 + n = 1.178511303 Solving 1.333333334 + n = 1.178511303 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + n = 1.178511303 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + n = 1.178511303 + -1.333333334 n = 1.178511303 + -1.333333334 Combine like terms: 1.178511303 + -1.333333334 = -0.154822031 n = -0.154822031 Simplifying n = -0.154822031

Subproblem 2

n + 1.333333334 = -1.178511303 Simplifying n + 1.333333334 = -1.178511303 Reorder the terms: 1.333333334 + n = -1.178511303 Solving 1.333333334 + n = -1.178511303 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-1.333333334' to each side of the equation. 1.333333334 + -1.333333334 + n = -1.178511303 + -1.333333334 Combine like terms: 1.333333334 + -1.333333334 = 0.000000000 0.000000000 + n = -1.178511303 + -1.333333334 n = -1.178511303 + -1.333333334 Combine like terms: -1.178511303 + -1.333333334 = -2.511844637 n = -2.511844637 Simplifying n = -2.511844637

Solution

The solution to the problem is based on the solutions from the subproblems. n = {-0.154822031, -2.511844637}

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