20k+2k-21k=7

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Solution for 20k+2k-21k=7 equation: 


Simplifying
20k + 2k + -21k = 7

Combine like terms: 20k + 2k = 22k
22k + -21k = 7

Combine like terms: 22k + -21k = 1k
1k = 7

Solving
1k = 7

Solving for variable 'k'.

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

Divide each side by '1'.
k = 7

Simplifying
k = 7

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