90=6(1-2k)

Solution for 90=6(1-2k) equation:

Simplifying
90 = 6(1 + -2k)
90 = (1 * 6 + -2k * 6)
90 = (6 + -12k)

Solving
90 = 6 + -12k

Solving for variable 'k'.

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

Add '12k' to each side of the equation.
90 + 12k = 6 + -12k + 12k

Combine like terms: -12k + 12k = 0
90 + 12k = 6 + 0
90 + 12k = 6

Add '-90' to each side of the equation.
90 + -90 + 12k = 6 + -90

Combine like terms: 90 + -90 = 0
0 + 12k = 6 + -90
12k = 6 + -90

Combine like terms: 6 + -90 = -84
12k = -84

Divide each side by '12'.
k = -7

Simplifying
k = -7