42-(-91)=k

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Solution for 42-(-91)=k equation:


Simplifying
42 + -1(-91) = k

Multiply -1 * -91
42 + 91 = k

Combine like terms: 42 + 91 = 133
133 = k

Solving
133 = k

Solving for variable 'k'.

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

Add '-1k' to each side of the equation.
133 + -1k = k + -1k

Combine like terms: k + -1k = 0
133 + -1k = 0

Add '-133' to each side of the equation.
133 + -133 + -1k = 0 + -133

Combine like terms: 133 + -133 = 0
0 + -1k = 0 + -133
-1k = 0 + -133

Combine like terms: 0 + -133 = -133
-1k = -133

Divide each side by '-1'.
k = 133

Simplifying
k = 133

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