9z-5-4z=15

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Solution for 9z-5-4z=15 equation: 


Simplifying
9z + -5 + -4z = 15

Reorder the terms:
-5 + 9z + -4z = 15

Combine like terms: 9z + -4z = 5z
-5 + 5z = 15

Solving
-5 + 5z = 15

Solving for variable 'z'.

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

Add '5' to each side of the equation.
-5 + 5 + 5z = 15 + 5

Combine like terms: -5 + 5 = 0
0 + 5z = 15 + 5
5z = 15 + 5

Combine like terms: 15 + 5 = 20
5z = 20

Divide each side by '5'.
z = 4

Simplifying
z = 4

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