10+10k-12=3(7k+9)-9(k-1)

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Solution for 10+10k-12=3(7k+9)-9(k-1) equation:


Simplifying
10 + 10k + -12 = 3(7k + 9) + -9(k + -1)

Reorder the terms:
10 + -12 + 10k = 3(7k + 9) + -9(k + -1)

Combine like terms: 10 + -12 = -2
-2 + 10k = 3(7k + 9) + -9(k + -1)

Reorder the terms:
-2 + 10k = 3(9 + 7k) + -9(k + -1)
-2 + 10k = (9 * 3 + 7k * 3) + -9(k + -1)
-2 + 10k = (27 + 21k) + -9(k + -1)

Reorder the terms:
-2 + 10k = 27 + 21k + -9(-1 + k)
-2 + 10k = 27 + 21k + (-1 * -9 + k * -9)
-2 + 10k = 27 + 21k + (9 + -9k)

Reorder the terms:
-2 + 10k = 27 + 9 + 21k + -9k

Combine like terms: 27 + 9 = 36
-2 + 10k = 36 + 21k + -9k

Combine like terms: 21k + -9k = 12k
-2 + 10k = 36 + 12k

Solving
-2 + 10k = 36 + 12k

Solving for variable 'k'.

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

Add '-12k' to each side of the equation.
-2 + 10k + -12k = 36 + 12k + -12k

Combine like terms: 10k + -12k = -2k
-2 + -2k = 36 + 12k + -12k

Combine like terms: 12k + -12k = 0
-2 + -2k = 36 + 0
-2 + -2k = 36

Add '2' to each side of the equation.
-2 + 2 + -2k = 36 + 2

Combine like terms: -2 + 2 = 0
0 + -2k = 36 + 2
-2k = 36 + 2

Combine like terms: 36 + 2 = 38
-2k = 38

Divide each side by '-2'.
k = -19

Simplifying
k = -19

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