3+7k=-(2k+1)

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

Simplifying
3 + 7k = -1(2k + 1)

Reorder the terms:
3 + 7k = -1(1 + 2k)
3 + 7k = (1 * -1 + 2k * -1)
3 + 7k = (-1 + -2k)

Solving
3 + 7k = -1 + -2k

Solving for variable 'k'.

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

Add '2k' to each side of the equation.
3 + 7k + 2k = -1 + -2k + 2k

Combine like terms: 7k + 2k = 9k
3 + 9k = -1 + -2k + 2k

Combine like terms: -2k + 2k = 0
3 + 9k = -1 + 0
3 + 9k = -1

Add '-3' to each side of the equation.
3 + -3 + 9k = -1 + -3

Combine like terms: 3 + -3 = 0
0 + 9k = -1 + -3
9k = -1 + -3

Combine like terms: -1 + -3 = -4
9k = -4

Divide each side by '9'.
k = -0.4444444444

Simplifying
k = -0.4444444444