2x+x+(x+3)=18

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Solution for 2x+x+(x+3)=18 equation:


Simplifying
2x + x + (x + 3) = 18

Reorder the terms:
2x + x + (3 + x) = 18

Remove parenthesis around (3 + x)
2x + x + 3 + x = 18

Reorder the terms:
3 + 2x + x + x = 18

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

Combine like terms: 3x + x = 4x
3 + 4x = 18

Solving
3 + 4x = 18

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 4x = 18 + -3

Combine like terms: 3 + -3 = 0
0 + 4x = 18 + -3
4x = 18 + -3

Combine like terms: 18 + -3 = 15
4x = 15

Divide each side by '4'.
x = 3.75

Simplifying
x = 3.75

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