31-k=10

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Solution for 31-k=10 equation: 


Simplifying
31 + -1k = 10

Solving
31 + -1k = 10

Solving for variable 'k'.

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

Add '-31' to each side of the equation.
31 + -31 + -1k = 10 + -31

Combine like terms: 31 + -31 = 0
0 + -1k = 10 + -31
-1k = 10 + -31

Combine like terms: 10 + -31 = -21
-1k = -21

Divide each side by '-1'.
k = 21

Simplifying
k = 21

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