15=-z+9

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Solution for 15=-z+9 equation:


Simplifying
15 = -1z + 9

Reorder the terms:
15 = 9 + -1z

Solving
15 = 9 + -1z

Solving for variable 'z'.

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

Add 'z' to each side of the equation.
15 + z = 9 + -1z + z

Combine like terms: -1z + z = 0
15 + z = 9 + 0
15 + z = 9

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

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

Combine like terms: 9 + -15 = -6
z = -6

Simplifying
z = -6

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