X+(X+3)=15

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Solution for X+(X+3)=15 equation:


Simplifying
X + (X + 3) = 15

Reorder the terms:
X + (3 + X) = 15

Remove parenthesis around (3 + X)
X + 3 + X = 15

Reorder the terms:
3 + X + X = 15

Combine like terms: X + X = 2X
3 + 2X = 15

Solving
3 + 2X = 15

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 + 2X = 15 + -3

Combine like terms: 3 + -3 = 0
0 + 2X = 15 + -3
2X = 15 + -3

Combine like terms: 15 + -3 = 12
2X = 12

Divide each side by '2'.
X = 6

Simplifying
X = 6

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