15=2x+(x+y)

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Solution for 15=2x+(x+y) equation: 


Simplifying
15 = 2x + (x + y)

Remove parenthesis around (x + y)
15 = 2x + x + y

Combine like terms: 2x + x = 3x
15 = 3x + y

Solving
15 = 3x + y

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
15 + -3x = 3x + -3x + y

Combine like terms: 3x + -3x = 0
15 + -3x = 0 + y
15 + -3x = y

Add '-15' to each side of the equation.
15 + -15 + -3x = -15 + y

Combine like terms: 15 + -15 = 0
0 + -3x = -15 + y
-3x = -15 + y

Divide each side by '-3'.
x = 5 + -0.3333333333y

Simplifying
x = 5 + -0.3333333333y

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