Solve for x
x=-y-7
Solve for y
y=-x-7
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-3x=21+3y
Add 3y to 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=-\left(y+7\right)
Divide 21+3y by -3.
-3y=21+3x
Add 3x to 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=-\left(x+7\right)
Divide 21+3x by -3.
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