-28=-20+k

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Solution for -28=-20+k equation:


Simplifying
-28 = -20 + k

Solving
-28 = -20 + 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.
-28 + -1k = -20 + k + -1k

Combine like terms: k + -1k = 0
-28 + -1k = -20 + 0
-28 + -1k = -20

Add '28' to each side of the equation.
-28 + 28 + -1k = -20 + 28

Combine like terms: -28 + 28 = 0
0 + -1k = -20 + 28
-1k = -20 + 28

Combine like terms: -20 + 28 = 8
-1k = 8

Divide each side by '-1'.
k = -8

Simplifying
k = -8

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