6z-5z-21=15

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Solution for 6z-5z-21=15 equation:


Simplifying
6z + -5z + -21 = 15

Reorder the terms:
-21 + 6z + -5z = 15

Combine like terms: 6z + -5z = 1z
-21 + 1z = 15

Solving
-21 + 1z = 15

Solving for variable 'z'.

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

Add '21' to each side of the equation.
-21 + 21 + 1z = 15 + 21

Combine like terms: -21 + 21 = 0
0 + 1z = 15 + 21
1z = 15 + 21

Combine like terms: 15 + 21 = 36
1z = 36

Divide each side by '1'.
z = 36

Simplifying
z = 36

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