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3x+20=-6y
Subtract 6y from both sides. Anything subtracted from zero gives its negation.
3x=-6y-20
Subtract 20 from both sides.
\frac{3x}{3}=\frac{-6y-20}{3}
Divide both sides by 3.
x=\frac{-6y-20}{3}
Dividing by 3 undoes the multiplication by 3.
x=-2y-\frac{20}{3}
Divide -6y-20 by 3.
6y+20=-3x
Subtract 3x from both sides. Anything subtracted from zero gives its negation.
6y=-3x-20
Subtract 20 from both sides.
\frac{6y}{6}=\frac{-3x-20}{6}
Divide both sides by 6.
y=\frac{-3x-20}{6}
Dividing by 6 undoes the multiplication by 6.
y=-\frac{x}{2}-\frac{10}{3}
Divide -3x-20 by 6.