x^2+7(3+2x)-2x(1+3k)=0

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Solution for x^2+7(3+2x)-2x(1+3k)=0 equation:


Simplifying
x2 + 7(3 + 2x) + -2x(1 + 3k) = 0
x2 + (3 * 7 + 2x * 7) + -2x(1 + 3k) = 0
x2 + (21 + 14x) + -2x(1 + 3k) = 0
x2 + 21 + 14x + (1 * -2x + 3k * -2x) = 0

Reorder the terms:
x2 + 21 + 14x + (-6kx + -2x) = 0
x2 + 21 + 14x + (-6kx + -2x) = 0

Reorder the terms:
21 + -6kx + 14x + -2x + x2 = 0

Combine like terms: 14x + -2x = 12x
21 + -6kx + 12x + x2 = 0

Solving
21 + -6kx + 12x + x2 = 0

Solving for variable 'k'.

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

Add '-21' to each side of the equation.
21 + -6kx + 12x + -21 + x2 = 0 + -21

Reorder the terms:
21 + -21 + -6kx + 12x + x2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -6kx + 12x + x2 = 0 + -21
-6kx + 12x + x2 = 0 + -21

Combine like terms: 0 + -21 = -21
-6kx + 12x + x2 = -21

Add '-12x' to each side of the equation.
-6kx + 12x + -12x + x2 = -21 + -12x

Combine like terms: 12x + -12x = 0
-6kx + 0 + x2 = -21 + -12x
-6kx + x2 = -21 + -12x

Add '-1x2' to each side of the equation.
-6kx + x2 + -1x2 = -21 + -12x + -1x2

Combine like terms: x2 + -1x2 = 0
-6kx + 0 = -21 + -12x + -1x2
-6kx = -21 + -12x + -1x2

Divide each side by '-6x'.
k = 3.5x-1 + 2 + 0.1666666667x

Simplifying
k = 3.5x-1 + 2 + 0.1666666667x

Reorder the terms:
k = 2 + 3.5x-1 + 0.1666666667x

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