91=-7(3z-1)

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Solution for 91=-7(3z-1) equation:


Simplifying
91 = -7(3z + -1)

Reorder the terms:
91 = -7(-1 + 3z)
91 = (-1 * -7 + 3z * -7)
91 = (7 + -21z)

Solving
91 = 7 + -21z

Solving for variable 'z'.

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

Add '21z' to each side of the equation.
91 + 21z = 7 + -21z + 21z

Combine like terms: -21z + 21z = 0
91 + 21z = 7 + 0
91 + 21z = 7

Add '-91' to each side of the equation.
91 + -91 + 21z = 7 + -91

Combine like terms: 91 + -91 = 0
0 + 21z = 7 + -91
21z = 7 + -91

Combine like terms: 7 + -91 = -84
21z = -84

Divide each side by '21'.
z = -4

Simplifying
z = -4

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