7z-4=9z-4

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Solution for 7z-4=9z-4 equation:


Simplifying
7z + -4 = 9z + -4

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

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

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

Combine like terms: -4 + 4 = 0
0 + 7z = -4 + 4 + 9z
7z = -4 + 4 + 9z

Combine like terms: -4 + 4 = 0
7z = 0 + 9z
7z = 9z

Solving
7z = 9z

Solving for variable 'z'.

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

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

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

Combine like terms: 9z + -9z = 0
-2z = 0

Divide each side by '-2'.
z = 0

Simplifying
z = 0

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