9z=7z-4

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Solution for 9z=7z-4 equation: 


Simplifying
9z = 7z + -4

Reorder the terms:
9z = -4 + 7z

Solving
9z = -4 + 7z

Solving for variable 'z'.

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

Add '-7z' to each side of the equation.
9z + -7z = -4 + 7z + -7z

Combine like terms: 9z + -7z = 2z
2z = -4 + 7z + -7z

Combine like terms: 7z + -7z = 0
2z = -4 + 0
2z = -4

Divide each side by '2'.
z = -2

Simplifying
z = -2

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