k+15=9-4k

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Solution for k+15=9-4k equation:


Simplifying
k + 15 = 9 + -4k

Reorder the terms:
15 + k = 9 + -4k

Solving
15 + k = 9 + -4k

Solving for variable 'k'.

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

Add '4k' to each side of the equation.
15 + k + 4k = 9 + -4k + 4k

Combine like terms: k + 4k = 5k
15 + 5k = 9 + -4k + 4k

Combine like terms: -4k + 4k = 0
15 + 5k = 9 + 0
15 + 5k = 9

Add '-15' to each side of the equation.
15 + -15 + 5k = 9 + -15

Combine like terms: 15 + -15 = 0
0 + 5k = 9 + -15
5k = 9 + -15

Combine like terms: 9 + -15 = -6
5k = -6

Divide each side by '5'.
k = -1.2

Simplifying
k = -1.2

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