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