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9x=15+8y
Add 8y to both sides.
9x=8y+15
The equation is in standard form.
\frac{9x}{9}=\frac{8y+15}{9}
Divide both sides by 9.
x=\frac{8y+15}{9}
Dividing by 9 undoes the multiplication by 9.
x=\frac{8y}{9}+\frac{5}{3}
Divide 15+8y by 9.
-8y=15-9x
Subtract 9x from both sides.
\frac{-8y}{-8}=\frac{15-9x}{-8}
Divide both sides by -8.
y=\frac{15-9x}{-8}
Dividing by -8 undoes the multiplication by -8.
y=\frac{9x-15}{8}
Divide 15-9x by -8.