3z-9=15

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Solution for 3z-9=15 equation: 


Simplifying
3z + -9 = 15

Reorder the terms:
-9 + 3z = 15

Solving
-9 + 3z = 15

Solving for variable 'z'.

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

Add '9' to each side of the equation.
-9 + 9 + 3z = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 3z = 15 + 9
3z = 15 + 9

Combine like terms: 15 + 9 = 24
3z = 24

Divide each side by '3'.
z = 8

Simplifying
z = 8

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