5k-7=12k+21

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Solution for 5k-7=12k+21 equation:


Simplifying
5k + -7 = 12k + 21

Reorder the terms:
-7 + 5k = 12k + 21

Reorder the terms:
-7 + 5k = 21 + 12k

Solving
-7 + 5k = 21 + 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.
-7 + 5k + -12k = 21 + 12k + -12k

Combine like terms: 5k + -12k = -7k
-7 + -7k = 21 + 12k + -12k

Combine like terms: 12k + -12k = 0
-7 + -7k = 21 + 0
-7 + -7k = 21

Add '7' to each side of the equation.
-7 + 7 + -7k = 21 + 7

Combine like terms: -7 + 7 = 0
0 + -7k = 21 + 7
-7k = 21 + 7

Combine like terms: 21 + 7 = 28
-7k = 28

Divide each side by '-7'.
k = -4

Simplifying
k = -4

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