15=(x+y)+3x

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Solution for 15=(x+y)+3x equation:


Simplifying
15 = (x + y) + 3x

Remove parenthesis around (x + y)
15 = x + y + 3x

Reorder the terms:
15 = x + 3x + y

Combine like terms: x + 3x = 4x
15 = 4x + y

Solving
15 = 4x + y

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
15 + -4x = 4x + -4x + y

Combine like terms: 4x + -4x = 0
15 + -4x = 0 + y
15 + -4x = y

Add '-15' to each side of the equation.
15 + -15 + -4x = -15 + y

Combine like terms: 15 + -15 = 0
0 + -4x = -15 + y
-4x = -15 + y

Divide each side by '-4'.
x = 3.75 + -0.25y

Simplifying
x = 3.75 + -0.25y

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