Solve for x
x=-\left(y+7\right)
Solve for y
y=-\left(x+7\right)
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3x=-21-3y
Subtract 3y from both sides.
3x=-3y-21
The equation is in standard form.
\frac{3x}{3}=\frac{-3y-21}{3}
Divide both sides by 3.
x=\frac{-3y-21}{3}
Dividing by 3 undoes the multiplication by 3.
x=-y-7
Divide -21-3y by 3.
3y=-21-3x
Subtract 3x from both sides.
3y=-3x-21
The equation is in standard form.
\frac{3y}{3}=\frac{-3x-21}{3}
Divide both sides by 3.
y=\frac{-3x-21}{3}
Dividing by 3 undoes the multiplication by 3.
y=-x-7
Divide -21-3x by 3.
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