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x+y=yx
Variable x cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by x.
x+y-yx=0
Subtract yx from both sides.
x-yx=-y
Subtract y from both sides. Anything subtracted from zero gives its negation.
\left(1-y\right)x=-y
Combine all terms containing x.
\frac{\left(1-y\right)x}{1-y}=-\frac{y}{1-y}
Divide both sides by 1-y.
x=-\frac{y}{1-y}
Dividing by 1-y undoes the multiplication by 1-y.
x=-\frac{y}{1-y}\text{, }x\neq 0
Variable x cannot be equal to 0.
x+y=yx
Multiply both sides of the equation by x.
x+y-yx=0
Subtract yx from both sides.
y-yx=-x
Subtract x from both sides. Anything subtracted from zero gives its negation.
\left(1-x\right)y=-x
Combine all terms containing y.
\frac{\left(1-x\right)y}{1-x}=-\frac{x}{1-x}
Divide both sides by 1-x.
y=-\frac{x}{1-x}
Dividing by 1-x undoes the multiplication by 1-x.