6-7(1+8k)=-21

Solution for 6-7(1+8k)=-21 equation:

Simplifying
6 + -7(1 + 8k) = -21
6 + (1 * -7 + 8k * -7) = -21
6 + (-7 + -56k) = -21

Combine like terms: 6 + -7 = -1
-1 + -56k = -21

Solving
-1 + -56k = -21

Solving for variable 'k'.

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

Add '1' to each side of the equation.
-1 + 1 + -56k = -21 + 1

Combine like terms: -1 + 1 = 0
0 + -56k = -21 + 1
-56k = -21 + 1

Combine like terms: -21 + 1 = -20
-56k = -20

Divide each side by '-56'.
k = 0.3571428571

Simplifying
k = 0.3571428571