5k-5=7k-21

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


Simplifying
5k + -5 = 7k + -21

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

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

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

Solving for variable 'k'.

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

Add '-7k' to each side of the equation.
-5 + 5k + -7k = -21 + 7k + -7k

Combine like terms: 5k + -7k = -2k
-5 + -2k = -21 + 7k + -7k

Combine like terms: 7k + -7k = 0
-5 + -2k = -21 + 0
-5 + -2k = -21

Add '5' to each side of the equation.
-5 + 5 + -2k = -21 + 5

Combine like terms: -5 + 5 = 0
0 + -2k = -21 + 5
-2k = -21 + 5

Combine like terms: -21 + 5 = -16
-2k = -16

Divide each side by '-2'.
k = 8

Simplifying
k = 8

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