9=z-4

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Solution for 9=z-4 equation:


Simplifying
9 = z + -4

Reorder the terms:
9 = -4 + z

Solving
9 = -4 + z

Solving for variable 'z'.

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

Add '-1z' to each side of the equation.
9 + -1z = -4 + z + -1z

Combine like terms: z + -1z = 0
9 + -1z = -4 + 0
9 + -1z = -4

Add '-9' to each side of the equation.
9 + -9 + -1z = -4 + -9

Combine like terms: 9 + -9 = 0
0 + -1z = -4 + -9
-1z = -4 + -9

Combine like terms: -4 + -9 = -13
-1z = -13

Divide each side by '-1'.
z = 13

Simplifying
z = 13

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