x+2x+(2x+30)=18

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Solution for x+2x+(2x+30)=18 equation:


Simplifying
x + 2x + (2x + 30) = 18

Reorder the terms:
x + 2x + (30 + 2x) = 18

Remove parenthesis around (30 + 2x)
x + 2x + 30 + 2x = 18

Reorder the terms:
30 + x + 2x + 2x = 18

Combine like terms: x + 2x = 3x
30 + 3x + 2x = 18

Combine like terms: 3x + 2x = 5x
30 + 5x = 18

Solving
30 + 5x = 18

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 + 5x = 18 + -30

Combine like terms: 30 + -30 = 0
0 + 5x = 18 + -30
5x = 18 + -30

Combine like terms: 18 + -30 = -12
5x = -12

Divide each side by '5'.
x = -2.4

Simplifying
x = -2.4

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