7z-21=-75+z

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Solution for 7z-21=-75+z equation:


Simplifying
7z + -21 = -75 + z

Reorder the terms:
-21 + 7z = -75 + z

Solving
-21 + 7z = -75 + 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.
-21 + 7z + -1z = -75 + z + -1z

Combine like terms: 7z + -1z = 6z
-21 + 6z = -75 + z + -1z

Combine like terms: z + -1z = 0
-21 + 6z = -75 + 0
-21 + 6z = -75

Add '21' to each side of the equation.
-21 + 21 + 6z = -75 + 21

Combine like terms: -21 + 21 = 0
0 + 6z = -75 + 21
6z = -75 + 21

Combine like terms: -75 + 21 = -54
6z = -54

Divide each side by '6'.
z = -9

Simplifying
z = -9

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