x+x+z=30

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Solution for x+x+z=30 equation: 


Simplifying
x + x + z = 30

Combine like terms: x + x = 2x
2x + z = 30

Solving
2x + z = 30

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.
2x + z + -1z = 30 + -1z

Combine like terms: z + -1z = 0
2x + 0 = 30 + -1z
2x = 30 + -1z

Divide each side by '2'.
x = 15 + -0.5z

Simplifying
x = 15 + -0.5z

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