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\left(y+3\right)\sqrt{3}=3x
Multiply both sides of the equation by 3\left(y+3\right), the least common multiple of 3,3+y.
y\sqrt{3}+3\sqrt{3}=3x
Use the distributive property to multiply y+3 by \sqrt{3}.
3x=y\sqrt{3}+3\sqrt{3}
Swap sides so that all variable terms are on the left hand side.
3x=\sqrt{3}y+3\sqrt{3}
The equation is in standard form.
\frac{3x}{3}=\frac{\sqrt{3}\left(y+3\right)}{3}
Divide both sides by 3.
x=\frac{\sqrt{3}\left(y+3\right)}{3}
Dividing by 3 undoes the multiplication by 3.
\left(y+3\right)\sqrt{3}=3x
Variable y cannot be equal to -3 since division by zero is not defined. Multiply both sides of the equation by 3\left(y+3\right), the least common multiple of 3,3+y.
y\sqrt{3}+3\sqrt{3}=3x
Use the distributive property to multiply y+3 by \sqrt{3}.
y\sqrt{3}=3x-3\sqrt{3}
Subtract 3\sqrt{3} from both sides.
\sqrt{3}y=3x-3\sqrt{3}
The equation is in standard form.
\frac{\sqrt{3}y}{\sqrt{3}}=\frac{3x-3\sqrt{3}}{\sqrt{3}}
Divide both sides by \sqrt{3}.
y=\frac{3x-3\sqrt{3}}{\sqrt{3}}
Dividing by \sqrt{3} undoes the multiplication by \sqrt{3}.
y=\sqrt{3}x-3
Divide 3x-3\sqrt{3} by \sqrt{3}.
y=\sqrt{3}x-3\text{, }y\neq -3
Variable y cannot be equal to -3.