7x+15y=x-3y

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Solution for 7x+15y=x-3y equation:


Simplifying
7x + 15y = x + -3y

Solving
7x + 15y = x + -3y

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
7x + -1x + 15y = x + -1x + -3y

Combine like terms: 7x + -1x = 6x
6x + 15y = x + -1x + -3y

Combine like terms: x + -1x = 0
6x + 15y = 0 + -3y
6x + 15y = -3y

Add '-15y' to each side of the equation.
6x + 15y + -15y = -3y + -15y

Combine like terms: 15y + -15y = 0
6x + 0 = -3y + -15y
6x = -3y + -15y

Combine like terms: -3y + -15y = -18y
6x = -18y

Divide each side by '6'.
x = -3y

Simplifying
x = -3y

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