7-5k=2k-21

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Solution for 7-5k=2k-21 equation:


Simplifying
7 + -5k = 2k + -21

Reorder the terms:
7 + -5k = -21 + 2k

Solving
7 + -5k = -21 + 2k

Solving for variable 'k'.

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

Add '-2k' to each side of the equation.
7 + -5k + -2k = -21 + 2k + -2k

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

Combine like terms: 2k + -2k = 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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