-21+7k=7(5k-7)

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Solution for -21+7k=7(5k-7) equation:


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

Reorder the terms:
-21 + 7k = 7(-7 + 5k)
-21 + 7k = (-7 * 7 + 5k * 7)
-21 + 7k = (-49 + 35k)

Solving
-21 + 7k = -49 + 35k

Solving for variable 'k'.

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

Add '-35k' to each side of the equation.
-21 + 7k + -35k = -49 + 35k + -35k

Combine like terms: 7k + -35k = -28k
-21 + -28k = -49 + 35k + -35k

Combine like terms: 35k + -35k = 0
-21 + -28k = -49 + 0
-21 + -28k = -49

Add '21' to each side of the equation.
-21 + 21 + -28k = -49 + 21

Combine like terms: -21 + 21 = 0
0 + -28k = -49 + 21
-28k = -49 + 21

Combine like terms: -49 + 21 = -28
-28k = -28

Divide each side by '-28'.
k = 1

Simplifying
k = 1

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