x+x-30=0

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Solution for x+x-30=0 equation: 


Simplifying
x + x + -30 = 0

Reorder the terms:
-30 + x + x = 0

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

Solving
-30 + 2x = 0

Solving for variable 'x'.

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

Add '30' to each side of the equation.
-30 + 30 + 2x = 0 + 30

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

Combine like terms: 0 + 30 = 30
2x = 30

Divide each side by '2'.
x = 15

Simplifying
x = 15

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