10k+9=-2k+21

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Solution for 10k+9=-2k+21 equation:


Simplifying
10k + 9 = -2k + 21

Reorder the terms:
9 + 10k = -2k + 21

Reorder the terms:
9 + 10k = 21 + -2k

Solving
9 + 10k = 21 + -2k

Solving for variable 'k'.

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

Add '2k' to each side of the equation.
9 + 10k + 2k = 21 + -2k + 2k

Combine like terms: 10k + 2k = 12k
9 + 12k = 21 + -2k + 2k

Combine like terms: -2k + 2k = 0
9 + 12k = 21 + 0
9 + 12k = 21

Add '-9' to each side of the equation.
9 + -9 + 12k = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 12k = 21 + -9
12k = 21 + -9

Combine like terms: 21 + -9 = 12
12k = 12

Divide each side by '12'.
k = 1

Simplifying
k = 1

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