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-9x=5+4y
Add 4y to both sides.
-9x=4y+5
The equation is in standard form.
\frac{-9x}{-9}=\frac{4y+5}{-9}
Divide both sides by -9.
x=\frac{4y+5}{-9}
Dividing by -9 undoes the multiplication by -9.
x=\frac{-4y-5}{9}
Divide 5+4y by -9.
-4y=5+9x
Add 9x to both sides.
-4y=9x+5
The equation is in standard form.
\frac{-4y}{-4}=\frac{9x+5}{-4}
Divide both sides by -4.
y=\frac{9x+5}{-4}
Dividing by -4 undoes the multiplication by -4.
y=\frac{-9x-5}{4}
Divide 5+9x by -4.