15=-6+z

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Solution for 15=-6+z equation: 


Simplifying
15 = -6 + z

Solving
15 = -6 + 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.
15 + -1z = -6 + z + -1z

Combine like terms: z + -1z = 0
15 + -1z = -6 + 0
15 + -1z = -6

Add '-15' to each side of the equation.
15 + -15 + -1z = -6 + -15

Combine like terms: 15 + -15 = 0
0 + -1z = -6 + -15
-1z = -6 + -15

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

Divide each side by '-1'.
z = 21

Simplifying
z = 21

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