-81=-(1-7k)+3k

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Solution for -81=-(1-7k)+3k equation:


Simplifying
-81 = -1(1 + -7k) + 3k
-81 = (1 * -1 + -7k * -1) + 3k
-81 = (-1 + 7k) + 3k

Combine like terms: 7k + 3k = 10k
-81 = -1 + 10k

Solving
-81 = -1 + 10k

Solving for variable 'k'.

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

Add '-10k' to each side of the equation.
-81 + -10k = -1 + 10k + -10k

Combine like terms: 10k + -10k = 0
-81 + -10k = -1 + 0
-81 + -10k = -1

Add '81' to each side of the equation.
-81 + 81 + -10k = -1 + 81

Combine like terms: -81 + 81 = 0
0 + -10k = -1 + 81
-10k = -1 + 81

Combine like terms: -1 + 81 = 80
-10k = 80

Divide each side by '-10'.
k = -8

Simplifying
k = -8

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