(k-1)=7(k-9)

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Solution for (k-1)=7(k-9) equation:


Simplifying
(k + -1) = 7(k + -9)

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

Remove parenthesis around (-1 + k)
-1 + k = 7(k + -9)

Reorder the terms:
-1 + k = 7(-9 + k)
-1 + k = (-9 * 7 + k * 7)
-1 + k = (-63 + 7k)

Solving
-1 + k = -63 + 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.
-1 + k + -7k = -63 + 7k + -7k

Combine like terms: k + -7k = -6k
-1 + -6k = -63 + 7k + -7k

Combine like terms: 7k + -7k = 0
-1 + -6k = -63 + 0
-1 + -6k = -63

Add '1' to each side of the equation.
-1 + 1 + -6k = -63 + 1

Combine like terms: -1 + 1 = 0
0 + -6k = -63 + 1
-6k = -63 + 1

Combine like terms: -63 + 1 = -62
-6k = -62

Divide each side by '-6'.
k = 10.33333333

Simplifying
k = 10.33333333

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