-21+2k=k-2k

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


Simplifying
-21 + 2k = k + -2k

Combine like terms: k + -2k = -1k
-21 + 2k = -1k

Solving
-21 + 2k = -1k

Solving for variable 'k'.

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

Add 'k' to each side of the equation.
-21 + 2k + k = -1k + k

Combine like terms: 2k + k = 3k
-21 + 3k = -1k + k

Combine like terms: -1k + k = 0
-21 + 3k = 0

Add '21' to each side of the equation.
-21 + 21 + 3k = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 3k = 0 + 21
3k = 0 + 21

Combine like terms: 0 + 21 = 21
3k = 21

Divide each side by '3'.
k = 7

Simplifying
k = 7

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