z+y=15

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Solution for z+y=15 equation: 


Simplifying
z + y = 15

Reorder the terms:
y + z = 15

Solving
y + z = 15

Solving for variable 'y'.

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

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

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

Simplifying
y = 15 + -1z

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