3k-8k=20

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Solution for 3k-8k=20 equation: 


Simplifying
3k + -8k = 20

Combine like terms: 3k + -8k = -5k
-5k = 20

Solving
-5k = 20

Solving for variable 'k'.

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

Divide each side by '-5'.
k = -4

Simplifying
k = -4

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