158=-3(2+7k)-7

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Solution for 158=-3(2+7k)-7 equation:


Simplifying
158 = -3(2 + 7k) + -7
158 = (2 * -3 + 7k * -3) + -7
158 = (-6 + -21k) + -7

Reorder the terms:
158 = -6 + -7 + -21k

Combine like terms: -6 + -7 = -13
158 = -13 + -21k

Solving
158 = -13 + -21k

Solving for variable 'k'.

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

Add '21k' to each side of the equation.
158 + 21k = -13 + -21k + 21k

Combine like terms: -21k + 21k = 0
158 + 21k = -13 + 0
158 + 21k = -13

Add '-158' to each side of the equation.
158 + -158 + 21k = -13 + -158

Combine like terms: 158 + -158 = 0
0 + 21k = -13 + -158
21k = -13 + -158

Combine like terms: -13 + -158 = -171
21k = -171

Divide each side by '21'.
k = -8.142857143

Simplifying
k = -8.142857143

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