-91=k+3(3k-7)

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Solution for -91=k+3(3k-7) equation:


Simplifying
-91 = k + 3(3k + -7)

Reorder the terms:
-91 = k + 3(-7 + 3k)
-91 = k + (-7 * 3 + 3k * 3)
-91 = k + (-21 + 9k)

Reorder the terms:
-91 = -21 + k + 9k

Combine like terms: k + 9k = 10k
-91 = -21 + 10k

Solving
-91 = -21 + 10k

Solving for variable 'k'.

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

Add '-10k' to each side of the equation.
-91 + -10k = -21 + 10k + -10k

Combine like terms: 10k + -10k = 0
-91 + -10k = -21 + 0
-91 + -10k = -21

Add '91' to each side of the equation.
-91 + 91 + -10k = -21 + 91

Combine like terms: -91 + 91 = 0
0 + -10k = -21 + 91
-10k = -21 + 91

Combine like terms: -21 + 91 = 70
-10k = 70

Divide each side by '-10'.
k = -7

Simplifying
k = -7

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