x+z=15

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Solution for x+z=15 equation: 


Simplifying
x + z = 15

Solving
x + z = 15

Solving for variable 'x'.

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

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

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

Simplifying
x = 15 + -1z

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