x+x-4=30

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Solution for x+x-4=30 equation: 


Simplifying
x + x + -4 = 30

Reorder the terms:
-4 + x + x = 30

Combine like terms: x + x = 2x
-4 + 2x = 30

Solving
-4 + 2x = 30

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 2x = 30 + 4

Combine like terms: -4 + 4 = 0
0 + 2x = 30 + 4
2x = 30 + 4

Combine like terms: 30 + 4 = 34
2x = 34

Divide each side by '2'.
x = 17

Simplifying
x = 17

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