40-k=42

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Solution for 40-k=42 equation: 


Simplifying
40 + -1k = 42

Solving
40 + -1k = 42

Solving for variable 'k'.

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

Add '-40' to each side of the equation.
40 + -40 + -1k = 42 + -40

Combine like terms: 40 + -40 = 0
0 + -1k = 42 + -40
-1k = 42 + -40

Combine like terms: 42 + -40 = 2
-1k = 2

Divide each side by '-1'.
k = -2

Simplifying
k = -2

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