9z-z=-1+5z-1-7

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Solution for 9z-z=-1+5z-1-7 equation:


Simplifying
9z + -1z = -1 + 5z + -1 + -7

Combine like terms: 9z + -1z = 8z
8z = -1 + 5z + -1 + -7

Reorder the terms:
8z = -1 + -1 + -7 + 5z

Combine like terms: -1 + -1 = -2
8z = -2 + -7 + 5z

Combine like terms: -2 + -7 = -9
8z = -9 + 5z

Solving
8z = -9 + 5z

Solving for variable 'z'.

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

Add '-5z' to each side of the equation.
8z + -5z = -9 + 5z + -5z

Combine like terms: 8z + -5z = 3z
3z = -9 + 5z + -5z

Combine like terms: 5z + -5z = 0
3z = -9 + 0
3z = -9

Divide each side by '3'.
z = -3

Simplifying
z = -3

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