12=7k-15+2k

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Solution for 12=7k-15+2k equation:


Simplifying
12 = 7k + -15 + 2k

Reorder the terms:
12 = -15 + 7k + 2k

Combine like terms: 7k + 2k = 9k
12 = -15 + 9k

Solving
12 = -15 + 9k

Solving for variable 'k'.

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

Add '-9k' to each side of the equation.
12 + -9k = -15 + 9k + -9k

Combine like terms: 9k + -9k = 0
12 + -9k = -15 + 0
12 + -9k = -15

Add '-12' to each side of the equation.
12 + -12 + -9k = -15 + -12

Combine like terms: 12 + -12 = 0
0 + -9k = -15 + -12
-9k = -15 + -12

Combine like terms: -15 + -12 = -27
-9k = -27

Divide each side by '-9'.
k = 3

Simplifying
k = 3

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